routines designed to take 20, 40 or 60 minutes, depending on the time you have. These sessions are simple, effective and each comes with running (Plan As) and non-running options (Plan Bs), in case you’re in the mood for a little variety. If you don’t have

Plan A Do a hill pyramid on the treadmill. Warm up for three minutes on a flat treadmill, then increase the incline by two degrees at a time (for two minutes at each setting). After four increases, lower the platform in two-degree increments (stay

Plan A Spend 40 minutes on the treadmill (five minute warm-up, 25 minutes going up the hill pyramid and 10 minutes going down). Then do three sets of 10 to 15 repetitions of the following moves, which use rubber or elastic band, a weighted ball