I’ve written several posts on how to climb, how to descend, nutrition and climbing, and related safety issues. Please review them because this post doesn’t discuss the mechanics. Instead, I want to reiterate something I’ve said in many prior posts: to get anywhere on your bike, you have to move your legs. The prior two posts about cadence were leading up to this conclusion: the only way to keep yourself moving forward efficiently is to pedal your bike.
If you’re not pedaling on a climb, you’ll fall over. If you’re not pedaling on a flat, you’ll slow down fast and fall over. “Duh,” you say, “but what about descents? It will be much more efficient for me to use the descent as an opportunity to let my tired legs rest.” The answer is no, you should be pedaling.
There are two issues to unpack from that: (1) You’re too tired, and (2) You haven’t fully grocked the mechanics of moving your bike forward.
If you’re too tired to pedal on a descent, you’re probably working on the challenge of the ride you’re on. That does not meant it is too challenging for you, but it does mean you should consider pacing yourself. Check with your doctor to make sure the exercise you’re planning is right for you. Then read my blog posts on nutrition. 90% of problems like this can be solved by eating and drinking more.
Otherwise, the issue may be a mechanical one. (First, after 5 or so serious rides, are you still in pain or numb in the feet, knees, back, arms, or butt? You likely need a bike fit (remind me to do a post on this issue).) That means you’re not using the lessons in cadence we discussed the last two weeks; review them.
If fitness and mechanics are not the issue, then you just have to trust me on this: on your descents, PEDAL YOUR BIKE. On climbs (obviously). On flats (less obvious than you’d think). On descents. YES, on descents…always pedal.
The reason is simple. So long as your pedal strokes are engaging the wheel, you’re gaining momentum. On a descent, you have a huge advantage: gravity. If you don’t pedal, friction (road and wind) will slow you down. If you do pedal, you can partially or wholly overcome friction. The only real exception is if you’re descending too fast for your skill level, or your speed is so high that even on your hardest gear you’re not adding to momentum
The advantages are huge. Not only will you go faster on the descent you’re on, but you will gain momentum to pull you over the next, inevitable hill. And you’ll exhaust yourself less gaining that momentum to push you over the hill than waiting for the climb to pedal.
So the take away is this: learn to use your gears, use them, and pedal your bike on every inch of every mile that you possibly can.