Exercises to Do With a Partner Colored Balls Have a partner toss three balls of different colors into the air, then shout out the names of one or two of the colors. Catch only the colors he or she shouts. Whistle Sprints Have a friend blow a whistle to signal the start and stop of a sprint. As soon as you hear the first whistle, explode into a sprint. When you hear the next whistle, come to a full stop. Try to do this on a tarmac track if you can. Forest Run The next time you run, choose a route with uneven ground and obstacles, like a trail through the woods. Your brain will struggle at first to react to all that visual stimuli, but eventually you’ll have no trouble skirting sticks, rocks and other debris. As this can be a bit dangerous, it’s best to bring a friend along just in case. Exercises to Do Alone Wall Ball Throw a tennis ball or small ball against a wall and catch it as it bounces back towards you, before it hits the floor. The harder you throw the ball, the quicker your reaction time will need to be in order to catch it. For an added challenge, consider using a reaction ball, which will bounce in an unpredictable direction on its way back to you. Jumps in Place Begin in a squat position. Without using your arms, explode upward and try to land in the same exact position in which you started. Focus on accuracy rather than speed to improve you reactionary reflexes. Continue for 30 seconds or as long as you can. Jump Rope Hold the rope with the ends in either hand behind your back. Begin to jump continuously on your toes, a couple of inches into the air. Bend your knees slightly, but keep your legs relatively straight. When your feet touch the ground, whip the rope over your head, then jump up a few inches again to allow the jump rope to sweep underneath you. Repeat this motion continuously for a minute or as long as you can. It can take a while to find your rhythm, but this exercise gets much easier with time. Stadium Steps Stand at the bottom of a set of bleachers or outdoor steps. Using both feet, jump from one step to the next as quickly as you can.