title: Lactic acid removal and heart rate frequencies during recovery after strenuous rowing exercise.
abstract: Three tests were conducted to assess the effectiveness of three different intensities of exercise both in reducing blood lactic acid (LA) levels and in influencing subjects' heart rate (HR), following a 2000 m race in a rowing boat. In the first and second tests these variables were investigated during a 13 min recovery exercise at 60% and 40% of the preceding maximum rowing speed respectively. In the third test the subjects had a resting recovery. The results include a significant increase (P less than 0.001) in the rate of lactate removal following the 40% recovery compared with the 60% and resting recoveries. The HRs were significantly lower during the last minute of resting recovery compared with 40% and 60% recoveries (P less than 0.001). The same was true when 40% recovery was compared with 60% recovery (P less than 0.001). The present data suggest firstly that 40% of the maximum rowing speed is an appropriate pace for effective LA removal and secondly that, at least for trained rowers, 86% of their maximum HR can be taken as an indication of work of an intensity at or above anaerobic threshold.
mesh_terms: D000328:Adult; D006339:Heart Rate; D006801:Humans; D007773:Lactates / Q000097:blood* / Q000378:metabolism; D019344:Lactic Acid; D008657:Metabolic Clearance Rate; D009132:Muscles / Q000378:metabolism; D010807:Physical Endurance; D013177:Sports; D013997:Time Factors
chemical_list: D007773:Lactates; D019344:Lactic Acid