Research about optimum recovery strength after maximum load for runners
The paper discusses 16 sportsmen finishing 400m running with maximum load on the pre-programmed automatic control runaway, makes sportsmen pile up lots of lactic acid, then determines respectively all different kinds of strength renewing sports' in clearing rate of Hla and observes relationship between Hla clearing away speed rate and renew sportsman's strength, and therefore find he optimum strength scope. The experiment shows that cleaing away Hla's fastest strength in 50%-65%, heart rate is between 145～165time/min.The research result proves that optimum renew sport's strength is 60% within 400 m, heart rate is 150-160 time/min. In this period the 16 sportsmen's running speed is (4.21±0.67) m/s, and it has no obvious differences in trainer's running speed oxygenless value (4.35±0.88)m/s (P0.05)