Support road.cc

Like this site? Help us to make it better.

Rubbish legs or not enough Fuel?

I've been building back up the miles after a fairly lax Christmas period where I didn't do more than one 30 mile ride a week for a couple of months.

I'm finding that once I hit ~40-45 miles or so, my legs just don't seem to have much left in the tank. I'll manage another 20 miles or so, but it's not what I'd call fun.

I've just been blaming my fitness and have been slowly increasing distances again. I'm doing about 60 miles a week at the moment, last summer I was regularly doing 80 or so (knee problems aside).

I was looking at some of the data on my new Garmin, and I started paying attention to the "calories burned" number. Today for example it read 2450 or so, considering my "normal" daily intake is 2500, that's a fairly high number and it got me thinking.

Generally, when fuelling for a ride like today's (4 hours), I'll have a big bowl of porridge & protein powder (~400 calories) along with 4-5 slices of malt loaf while I'm out (~130 calories each).

There's obviously a bit of a deficit there - is that a problem though? I'm not trying to lose any weight (5'9" and 10 stone), there's little left to lose.

It doesn't feel like "proper" bonking - before I started cycling more seriously I spent a summer commuting to work on my MTB without increasing my food intake - I used to feel like hell for the last 5 miles or so of the journey home - but on the plus side I lost three stone in three months  1

So, is the consensus to eat enough to match what you burn? Or are my legs just a bit rubbish at the moment and I need to step up the training.

Cheers,

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

Add new comment

27 comments

Avatar
Judge dreadful | 9 years ago
0 likes

I eat a banana for breakfast, then go and do a ride of between 130 and 170 miles, a fair bit. I stop for a coffee and a cake, at about half distance, then top up my energy levels with jelly babies, and pistachio nuts, on the return. I regularly end up with a calorie deficit of 3000 after one of these rides, so if I know I'm doing a 5000 calorie ride on (for example) the Friday, I'll use an app such as myfitnesspal, during the week, to try and get a calorie excess of about 4000, in the week leading up to the ride. Thus far, it's worked quite well. I rarely bonk on a big ride, if I think I'm heading for the bonk, I'll use the aforementioned emergency supplies to try and avoid it. I've found that if I do bonk, the best way to emergency fuel to get home, is to add coconut oil to a double shot espresso. That really hits the spot.

Avatar
dotdash | 9 years ago
0 likes

Anyway I was out on a ride today and I've noticed that I feel like I have no energy at all. Hills were just hard work for me, but I noticed the rear wheel was slightly out. I was so knackered at the end of my ride today that I just stopped peddling on a hill and fell over (lucky it was on a closed road).

I'm still building up my distance at the moment but I think I'm going to do one short ride, one medium and a longer ride which pushes my distance. Also hoping to have my road bike back on the road soon which will help.

Avatar
Man of Lard replied to dotdash | 9 years ago
0 likes
dotdash wrote:

Anyway I was out on a ride today and I've noticed that I feel like I have no energy at all.

You bonked. Need to review your energy strategy (in short what you eat & drink, how much of it and when - but against what youre expending in riding)

Avatar
dotdash replied to Man of Lard | 9 years ago
0 likes
Man of Lard wrote:
dotdash wrote:

Anyway I was out on a ride today and I've noticed that I feel like I have no energy at all.

You bonked. Need to review your energy strategy (in short what you eat & drink, how much of it and when - but against what youre expending in riding)

Yea I knew that as it was happening, I think last year I was doing these distances without food and just with water 2 or 3 times a week. But being of the bike for 7 months and this being only my 7 ride back means my targets have been reset.

Avatar
Simon E | 9 years ago
0 likes

Garmin calorie counter is a made-up number. Ignore it.

Regardless of what might be the cause, I suggest you try changing your food timings.

A *small* bowl of something light like Rice Krispies before you leave, or better still nothing. I suspect that by eating a large portion before starting your body is set to expect more of the same.

Carry and consume at least 2 water bottles, ideally 750ml. Also carry a malt loaf cut into 4 slices/chunks. I like Snickers, cut in half and stowed in the seat pack so I have to stop to get at them.

Don't touch the malt loaf/Snickers/whatever until you've been riding for at least 1.5 or 2 hours.

When you get home blend a banana with milk and a scoop of protein powder, then a protein-dense lunch with real food a little while afterwards - beans on toast, tuna sarnie, scrambled eggs or similar.

Avatar
CXR94Di2 | 9 years ago
0 likes

Your mileage seems a little on the low side for endurance riding. Try and build it up to 125-150 miles a week With a least one ride of 60+ miles of steady riding. The other rides can be shorter but with interval sessions built in.

drink(well sip) upto 1 litre per hour and eat complex carbs of no more than 50g carbs (including drink if it's a carb drink.) Per hour

Avatar
sergius replied to CXR94Di2 | 9 years ago
0 likes
CXR94Di2 wrote:

Your mileage seems a little on the low side for endurance riding. Try and build it up to 125-150 miles a week With a least one ride of 60+ miles of steady riding. The other rides can be shorter but with interval sessions built in.

drink(well sip) upto 1 litre per hour and eat complex carbs of no more than 50g carbs (including drink if it's a carb drink.) Per hour

I wish  1 I get enough grief disappearing out on the bike for 4-5 hours on the bike once a week on the weekend  1

I get to do some bits in the gym during the week and I'll experiment with commuting to work again when the daylight returns - but it's a pretty crappy 60 mile round trip through London and out the other side.

Avatar
sergius | 9 years ago
0 likes

I am comparing with last summer, I figured a bit more of my fuel would go towards keeping warm - but hadn't really factored in muscle efficiency vs. temperature.

I don't have a lot to background to base things on, I only got my road bike last winter and didn't have the gear to go out much then. So I've only really one summers' of experience to dwell on.

Avatar
Must be Mad | 9 years ago
0 likes

Build up the endurance slowly - if you are used to doing 30mile rides, then yes, the legs will fell fine at 30 miles, and dead by 35. But next time, you should feel fine doing the 35. Just build up the distance slowly.

Also - you are comparing your performance to last summer?
Very dangerous, as this time year the cold air is more dense, the winter weighs more then summer garb and muscles are less efficient when cold. You also consume more calories just keeping yourself warm. So its very difficult to compare performance now with what you were doing in the summer.

Work on building fitness right now, and then when the temperatures warm up, you should find the performance comes back to you.

Avatar
daddyELVIS | 9 years ago
0 likes

As you slowly build, your endurance will improve.

Remember, the Sky GC riders don't eat anything  4

Avatar
Goyt | 9 years ago
0 likes

If you're getting 10 slices out of your Soreen loaf you are certainly under-fuelled, if you're getting 5 slices per loaf that's about 33-34 grams of carbs per slice which is under (what I think is) the recommended 40-60g of carb intake per hour.

I think you could be starting to feel that deficit in the last hour or so of a long ride 4 or 5 hour ride, especially if you are also increasing the length of your rides.

Try adding some energy drinks and perhaps swapping the 4th or 5th slice for a couple of more quickly digestible gels to get the carbs in before you've finished your ride.

Avatar
sergius replied to Goyt | 9 years ago
0 likes
Goyt wrote:

If you're getting 10 slices out of your Soreen loaf you are certainly under-fuelled, if you're getting 5 slices per loaf that's about 33-34 grams of carbs per slice which is under (what I think is) the recommended 40-60g of carb intake per hour.

I think you could be starting to feel that deficit in the last hour or so of a long ride 4 or 5 hour ride, especially if you are also increasing the length of your rides.

Try adding some energy drinks and perhaps swapping the 4th or 5th slice for a couple of more quickly digestible gels to get the carbs in before you've finished your ride.

I've been buying the pre-sliced ones, so roughly 12 slices per loaf. I'll generally consume 4 per ride, so 1/3 of a Soreen loaf.

I've already arranged with my wife to pick up some extra bananas for next weekend - I'm not allowed to break into the children's supply of fruit!

Avatar
dotdash replied to sergius | 9 years ago
0 likes
sergius wrote:

I've been buying the pre-sliced ones, so roughly 12 slices per loaf. I'll generally consume 4 per ride, so 1/3 of a Soreen loaf.

Pre sliced screen comes as 11 slices per loaf and it upsets me how can you share 11? what they have done is used 10 blades to cut it, when they should have used 11. This is a very upsetting for me.

Avatar
Colin Peyresourde | 9 years ago
0 likes

You just need to ensure you are taking on calories as you go. It might also be that you are working too hard - there is a double whammy effect when your heart rate elevates. Firstly, you consume blood sugars more quickly - more so if you are in the red (or working anaerobically). And secondly, your digestive tract stops working if you are working too hard (the blood is pumped elsewhere).....which is how Michele Ferrari was able to calculate if a rider was going to crack - you can't work at a particular rate for too long without bonking.

Basically ensure that you have an energy drink in one of your bidons (4:1 is a fav) and that you drink every 15 minutes on longer rides, and nibble something every 30-45 minutes. That should keep you going for longer.

Keep a gel with you as a 'get out jail free' card. Gels are nasty and you don't want to use them, but If you are tanking it'll keep you going, but as soon as you reach for it you'll need to be eating and drinking as much as you can because you will be on empty.

If you are riding at intensity you need will only be able to ride for 2-3 hours max without refuelling. After that you'll have used all your blood sugars and glycogen stores. So what you describe seems to fit in with bonking perfectly.

Avatar
Edgeley | 9 years ago
0 likes

I find refuelling with beer half way though a ride is very effective. And planning a ride with a good pub in the middle is fun.

Avatar
DaSy | 9 years ago
0 likes

The calorie calculation (let's call it that!) on the Garmin is woeful, and over estimates by close to double!

I ride with a power meter on one bike and not on the other, and the total power over a ride with PM is as close as damn it to the same as the calories consumed on the ride due to the body's efficiency at processing calories to make kilojoules. This is reflected in the calorie figure being the same on my 810 as the Kj figure when on the PM equipped bike.
I did the same ride yesterday on the bike without PM (which is incidentally, lighter and has better wheels etc), and the calorie estimation that is just based on time, weight and distance instead of any actual measurement of consequence, was just under double the figure previously measured.

Avatar
dajoby | 9 years ago
0 likes

thought this would be a decent place to make a first post. hello all.

i too did barely any miles over christmas. a chest infection killed november so i'd been off the bike until middle of feb. i'm a really average rider but here's my experience of fueling for a ride.

this does not assume you've had breakfast as i will often ride without it unless it's going to be a biggie (70 miles plus)...it does assume a decent coffee before you leave. natch  3

out for an hour or so? take a water bottle. with water in it.

out for 2? take a gel (high 5, citrus...taste like melted icepop) and a bottle, with robinsons in it.

out for 3, 4, 5, 6+? porridge an hour before leaving. double espresso before heading out the door. a gel for every hour expected on the bike (and bits of flapjack) - two bottles - both with high 5 electrolyte mix in them).

i don't ride at all hard for the first 10 miles as it ruins me if i do. i generally ride to where i'm working but not destroying myself.

for me, it's all about the miles in your legs. turn your legs over for longer distances more often and the easier it gets.

Avatar
livestrongnick | 9 years ago
0 likes

Don't forget that what you eat the night before will be fueling your body. I always carb up the night before a ride and then breakfast tops me up.  26

Avatar
gnarlyrider | 9 years ago
0 likes

I think you need more fuel. I can ride for 2 to 2.5 hours unfuelled (even no breakfast) but beyond that it gets slow and painful. Using High 5 energy drink, malt loaf, bananas and even gels seem to fix this - the drink alone is surprisingly effective. Eat little and often on longer rides. Recently the same (70 mile) ride with and without fuel were leagues apart in terms of ability to maintain pace - with fuel I could significantly press on for the last hour.

Years ago on properly long rides 100 to 150 on successive days I found I wound wind down to a slow pace as I ran out of fuel - I am guessing this was my fat burning level then add a Mars bar every 20 minutes and I was back up to normal pace.

Eat more get more

Avatar
ianj replied to gnarlyrider | 9 years ago
0 likes

agree 100% your not eating enough when on the bike.....

Avatar
unistriker | 9 years ago
0 likes

If I ride hard, I am done after 70 mins. I need to eat or my legs feel dead.

If I ride slow it can be two hours before i feel hungry and slow.

If you are saying your pacing is fine and your food is fine. then its your fitness. otherwise just eat more

Avatar
Stratman | 9 years ago
0 likes

I'm not sure that I'd trust the calorie readings on the Garmin. I got widely different values on my 20-odd mile commute with and without a heart rate strap. (With was substantially lower) even though the time was very similar. I'd just aim for more miles, and eating a bit before you get hungry - I'm a cereal bar man myself.

Avatar
sergius | 9 years ago
0 likes

On the drinking front, I tend to make do with two bottles, as you say little and often. I generally use the electrolyte tabs from High-5/SIS as I used to get cramp in my calfs + I like the taste!

Avatar
ianrobo replied to sergius | 9 years ago
0 likes
sergius wrote:

On the drinking front, I tend to make do with two bottles, as you say little and often. I generally use the electrolyte tabs from High-5/SIS as I used to get cramp in my calfs + I like the taste!

after taking advice off here, I simply take water on days like these and when hotter will do diluted orange juice with sugar and maybe half an electrolyte tab

Avatar
ianrobo | 9 years ago
0 likes

It is about endurance, simply sounds like you do not have enough miles under the bonnet, try doing some short interval training, esp if there is a good 5 min hill near you.

Avatar
sergius | 9 years ago
0 likes

The everyone is different point is a good one.

I'll tend to have a couple of five minute breaks over a four hour ride, I don't ride crazily hard when out for a longish run - I certainly pace myself.

The more I think about it, I'm starting to convince myself I may be starting to "bonk" after ~45 miles or so. When doing a few Sportives last year I ended up eating a lot more than normal (mmm flapjacks) on 80ish mile rides - I never felt particularly drained - at that point it was more some persistent knee pain that I've now sorted.

An experiment is in order, next weekend I'll try eating more when I'm out - see if it makes much difference  1

Avatar
Daveyraveygravey | 9 years ago
0 likes

Hard to tell from what you've said. I rode 2.5 hrs this morning then had a bacon sarnie and did another 2 hours; we're all different. For me, I get a pick up just by stopping around the 2, 2.5 hrs mark, even without eating. Are you just riding too hard and/or too long?
I believe your body can only process something like 60 cals an hour so no point pigging out. What do you drink on a ride? I got through two bottles on my ride today, one of water one of SIS diluted stuff, I find sipping constantly really helps me, a little and often.

Latest Comments