32 Celsius = 89 F !!!!!!!!!!!!
Effect of water temperature on performance, lactate production and heart rate at swimming of maximal and submaximal intensity.
Mougios V, Deligiannis A.
The effect of water temperature on performance effort, monitored heart rate and lactate production during freestyle swimming at maximal and submaximal speed has been studied. Fifteen male sprint swimmers performing 100 m swimming and fifteen comparable endurance competitors performing 30 min swimming at submaximal speed served as subjects. Water temperature in separate events was 20, 26 and 32 degrees C. At maximal performance there was a direct relationship between any two of the following parameters: water temperature, average swimming speed, heart rate during the competition and plasma lactate concentration after the event. Thus, the best effort (speed 1.704 m/s), the highest peak heart rate (185 beats/min) and the highest lactate level (19.8 mmol/l) were observed at 32 degrees C (all mean values). In contrast, these values were markedly lower at 20 degrees C. At the submaximal effort, water temperature was related to peak heart rate only. The highest peak heart rate (144 beats/min) was again obtained at 32 degrees C, while the lactate concentration (4.2-5.2 mmol/l) was independent of temperature. Water temperature appears to have a direct effect on performance effort, heart rate and lactate production during swimming at maximal intensity, whereas this effect seems to fade at submaximal efforts.
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Former Member
Obviously nobody wants to work out in 90 degree waters. But I thought it was interesting that the average swimmer is faster in 90 degrees, compared to 79 (which is competition temp).
It goes to show you - just because everybody says that 78-80 is best, that does not make it true - one would need a larger sample. But for the sprints, it makes a lot of sense (one sprint that is ...)
The Threshold swims showed that the HR was much higher at 90 degrees, which makes sense -- but the Lactate was actually lower ???
I work out at 4 different pools - temp varies at times between 76 and 85. I can adjust my workout for the warm water - but I can not adjust anything at 76 degrees - more or less continuous swimming is a mindless way of working out. The outside temp is also somewhat important - 79 degrees with 60 degree outside (+ wind) is a lot different than 79 water and 80 outside (Arizona).
Obviously nobody wants to work out in 90 degree waters. But I thought it was interesting that the average swimmer is faster in 90 degrees, compared to 79 (which is competition temp).
It goes to show you - just because everybody says that 78-80 is best, that does not make it true - one would need a larger sample. But for the sprints, it makes a lot of sense (one sprint that is ...)
The Threshold swims showed that the HR was much higher at 90 degrees, which makes sense -- but the Lactate was actually lower ???
I work out at 4 different pools - temp varies at times between 76 and 85. I can adjust my workout for the warm water - but I can not adjust anything at 76 degrees - more or less continuous swimming is a mindless way of working out. The outside temp is also somewhat important - 79 degrees with 60 degree outside (+ wind) is a lot different than 79 water and 80 outside (Arizona).
