Biking is an activity that you can typically warm up on the bike. I usually do 15-20 minutes of light to moderate pedaling, raising your heart rate and pace slightly as you go. At the end of 15-20 minutes, if you’re feeling any tightness, get off the bike and do some light static stretches to work out your hip flexor and hamstrings. For cool down, do the opposite and taper from high intensity to low. Focus on stretching any tight areas at this time, which may also include the chest and upper body.