Abstract

The heart rates and subsequent estimated energy expenditure during approximately one hour of recreational surfing were examined. Six male volunteers participated in this study. Heart rate data were gathered using a modified Sports Tester PE3000S microcomputer telemetry system. These data were used to estimate energy expenditure using a regression formula of oxygen uptake versus heart rate data established during a progressive peak oxygen uptake test on a Repco Swim Bench Ergometer. Mean heart rate while recreational surfing was 135 beats/min, while mean values for paddling and stationary were 143 beats/min and 127 beats/min respectively. There was a statistically significant difference between mean heart rates for these activities. Mean heart rates for the total time surfing, paddling and stationary represented 75, 80 and 71 respectively of the groups mean peak heart rate attained in the laboratory. Mean total time spent stationary, paddling and riding waves represented 35, 44 and 5 of the total time surfing respectively. The mean peak oxygen uptake value for the group as determined during simulated paddling in the laboratory was 3.75 l/min. Mean estimated oxygen uptake while recreational surfing was 1.68 l/min, which represented 46 of the groups mean laboratory value. The mean peak oxygen uptake while recreational surfing was 2.78 l/min, which represented 75 of the groups mean laboratory value. Mean estimated energy expenditure for the total time surfing was 2077 kJ. Verf.-Referat (gekuerzt)