Fading on the second climb of a Cariboo ride is common, and fixable. Good mountain bike fitness training means steady aerobic base work, short hard efforts and basic strength, all built up gradually.
This guide is a spoke of our wider mountain bike skills series, so it focuses on the engine behind the skills.
| Item | Value |
|---|---|
| Weekly moderate-to-vigorous aerobic activity (adults 18-64) | At least 150 minutes per week |
| Muscle strengthening (adults 18-64) | Major muscle groups, at least twice a week |
| Share of a cross-country race above the second ventilatory threshold | 37.0 ± 17.9% |
| Mean intensity of that race effort | 87% of maximal oxygen uptake |
| Share of a cross-country race spent above maximal aerobic power | 25% |
Figures come from the Canadian 24-Hour Movement Guidelines for adults and a 2018 Frontiers in Physiology study of cross-country racing. They can change, so check the sources before you rely on them.
What trail riding actually asks of your body
Trail riding is not a steady grind. It is a stop-start mix of climbing, coasting, sprinting out of corners and holding a tense position on descents.
Research on racing shows the pattern clearly. In the 2018 study, the authors concluded that the current cross-country race format is “an acyclical and intermittent exercise comparable to high-intensity team sports.” Riders spent 37.0 ± 17.9% of the race above the second ventilatory threshold, at a mean intensity of 87% of maximal oxygen uptake, and 25% of the race above maximal aerobic power.
That was a study of racers, not weekend riders, and the sample was small. Still, the lesson carries over: you need a solid aerobic engine, plus the ability to recover from short, hard surges and keep riding well afterward.
For a long day out, that translates into three qualities:
- Aerobic endurance to keep pedalling for hours without your pace collapsing.
- Repeatable power for steep pitches, rocky punches and short sprints.
- Strength and stability in your legs, hips, core and upper body so your technique holds when you are tired.
Build an aerobic base first
Most of your riding should feel conversational. This easy work builds the endurance that lets you finish a long loop with energy left for the final descent.
The Canadian 24-Hour Movement Guidelines for adults aged 18-64 recommend an accumulation of at least 150 minutes per week of moderate to vigorous aerobic physical activity. Those guidelines are aimed at general health, not at riding performance, so treat them as a floor rather than a goal. If you are new to regular exercise, reaching that level steadily is a sensible first target.
A simple way to build up:
- Pick a weekly ride length you can already finish comfortably.
- Extend your longest ride by a small amount each week or two, rather than jumping up suddenly.
- Take an easier week now and then so your body can absorb the work.
- Keep most rides at a pace where you can still speak in full sentences.
Non-riding activity counts too. Running, hiking, swimming or fast walking all add to your aerobic base, which helps when weather or daylight limits time on the bike.
Add short hard efforts for steep terrain
Because trail riding includes bursts above your comfortable pace, a little harder work pays off. You do not need much, and it should stay a minority of your riding.
Try one of these once a week, after you have a few weeks of base riding behind you:
- Hill repeats: climb a steady hill hard, then spin down and recover fully before repeating.
- Surge rides: during a normal ride, pick short sections such as a steep pitch or a rooty rise and push hard through them.
- Tempo blocks: hold a firm, controlled effort for a sustained stretch, then return to easy riding.
Rest between hard sessions matters as much as the sessions. If your legs feel flat, your sleep suffers or your mood drops, ease off for a few days before pushing again.
Strength work that carries over to the trail
Strong riders hold good form longer. The same Canadian guidelines recommend muscle strengthening activities using major muscle groups at least twice a week, which is a realistic target for most riders.
Choose simple, repeatable movements:
- Squats and lunges for the legs and hips.
- Deadlift or hip-hinge patterns for the back and glutes.
- Planks and similar core work for stability on rough ground.
- Push-ups and rows for the arms, shoulders and upper back that handle braking and steering.
These muscles matter most when you are tired. A fatigued rider tends to sag into the bike, grip too hard and lose control, which makes our guide to mountain bike body position harder to put into practice. Strength is what lets you stay centred and relaxed late in the day.
The same goes for technical ground. Staying balanced through chunky sections is easier when your legs and core are not already spent, as covered in how to ride roots and rocks on a mountain bike, and a sentence from that guide is a good reminder that fitness and skill feed each other.
Recovery, fuel and sleep
Fitness is built during recovery, not during the ride itself. Sleep and food are part of training, not extras.
The Canadian guidelines for adults aged 18-64 also call for limiting sedentary time and practising healthy sleep hygiene. For riders, that means regular sleep, getting up from the desk often, and not stacking hard days back to back without a break.
On long rides, bring more food and water than you think you need. Eat small amounts regularly rather than waiting until you feel empty, because hunger on the trail usually means you are already behind. Cariboo days can be hot and dry or cool and wet, so plan your drinks and layers for the conditions.
Putting a week together
A balanced week for a recreational rider might look like this:
- Several easy to moderate rides, with a long one on the weekend.
- A shorter session with harder efforts, such as hill repeats.
- Short strength sessions at least twice a week, which can be done at home.
- A real rest day with light movement only.
Adjust it around your work, family and the season. Consistency over months beats a perfect plan that you abandon after a short burst. If you have a health condition, are returning after illness or injury, or are unsure about your limits, talk with a doctor or qualified health professional before ramping up.
Frequently asked questions
How often should I train for longer mountain bike rides?
Show answer
Most recreational riders do well with several rides a week plus short strength sessions. The Canadian guidelines suggest at least 150 minutes of moderate to vigorous aerobic activity weekly as a general health baseline.
Do I need a gym for mountain bike fitness training?
Show answer
No. Bodyweight squats, lunges, planks and push-ups cover the major muscle groups, and the Canadian guidelines ask for strengthening at least twice a week using them.
Is trail riding mostly aerobic or anaerobic?
Show answer
Both. In the 2018 racing study, a large share of race time was above the second ventilatory threshold, and the authors described the sport as intermittent exercise comparable to high-intensity team sports.
What should I do if I get tired late in a ride?
Show answer
Slow down, eat and drink, and focus on relaxed body position. Over time, more easy base riding and regular strength work make late-ride fatigue less severe.
