---- and holding your hands at your sides. Complete the prescribed number of repetitions with the left leg before switching to the right leg.
(3) One-leg hops in place: This exercise builds strength and coordination in the entire lower extremity, including the foot, ankle, shin, calf, thigh, and hip. The resilient, bouncy nature of the exercise makes it the most specific of the three - extremely close to the actual movements involved in running. Simply start from the same position you used for the one-leg squat, with the toes of the right foot supported by a six- to eight-inch block. Hop rapidly on the left foot at a cadence of 2.5 to 3 hops per second (25 to 30 foot contacts per 10 seconds) for the prescribed time period as shown in the training programme. The left knee should rise about four to six inches, while the right leg and foot should remain stationary. The left foot should strike the ground in the area of the mid-foot and spring upwards rapidly - as though it were contacting a very hot plate on a cooker. The hips should remain level and virtually motionless throughout the exercise, with very little vertical displacement. After hopping for the indicated time on the left leg, switch to the right leg and repeat the exercise.
Why hop on one foot instead of bounding from foot to foot, as runners usually do during their drills? For one thing, it's very difficult to move fast while you are bounding, so bounding is not very much like sizzling through a 5-K or 10-K race. By contrast, you can move very quickly during the one-leg hops, so your power expands dramatically and your coordination during high-speed running improves greatly. Eventually you'll learn to move more quickly and efficiently. Research carried out by Russian scientists indicates that one-leg hopping is far superior to bounding at inducing improvements in leg speed ('Muscles and the Sprint,' Legkay Atletika, No. 5, pp. 8-11, 1992, cited in Fitness and Sports Review International, pp. 192-195, December 1992).
For similar reasons, the one-leg squat is superior to runners' traditional exercise - the two-legged squat. While a much greater load can be hoisted on the shoulders during a two-legged squat, that weight is distributed through two legs, not one, so the actual resistance per leg is often less. In addition, the trunk of the body is often inclined significantly forward in a two-legged squat but remains nearly vertical in a one-leg effort, so the latter more closely parallels the form required for running. Plus, for purposes of maintaining balance, the feet are often angled outward during the two-leg squat, which is unnatural to running, while the feet point straight ahead during a one-leg effort. Overall, the one-leg squat has the added advantage of being safer, since less total weight is used.
Overall, the strength-building triad carries little risk of injury, takes little of your time, and is very specific to the actual act of running. The three exercises will improve both your coordination and leg-muscle power, and after several weeks you'll notice that your legs feel much stronger and that your stride length and frequency have improved. You'll move quickly and aggressively from one foot to the other as you run, and you'll reach the finish lines of your races in faster and faster times.
Walt Reynolds,