Buy appropriate equipment (especially shoes) for each sport you choose for your cross-training. Reserve your trail-running shoes for running only.
Step2
Schedule rest days between days with intense workouts. Target different muscle groups on consecutive days to allow your body to recover between sessions.
Step3
Target your upper body through weight lifting, swimming, yoga and stretching. Your legs do almost all of the work when you're trail running, leaving your arms, back and shoulders weak and susceptible to injury.
Step4
Increase your speed by running indoors on a treadmill or doing sprints on a track.
Step5
Build endurance and leg strength by mountain biking, road biking or taking a spinning class.
Step6
Improve your leg strength during the winter by snowshoe running and skiing.
Step7
Make eating well your last and most important cross-training event. You'd be surprised how much a healthy diet can improve your performance on the trail.
Tips & Warnings
Cross-training helps prevent injuries that result from overworking one set of muscles and ignoring others.
Almost any kind of aerobic activity will help you on the trails. Other suggestions: in-line skating, ice hockey, soccer, basketball and rock climbing.
Reduce your trail-running mileage when pursuing an active cross-training schedule to avoid potential overuse injuries.