Although the deep muscle temperature increases with microwave treatment using 20 w, 30 w and 40w were higher compared with control group, no statistically significant difference was seen between the two groups.
When muscle temperature increases, your blood flow increases which brings oxygen and healing nutrients to the muscles.
The temperature increased gradually in superficial muscles with increasing microwave dose.
The main design discriminant was the holding temperature; increased temperature gave increased blood lactate, rigor index (Ir), drip loss (DL), content of astaxanthin and intensity of redness, but reduced muscle pH, cathepsin activity and fillet lightness.
This study has demonstrated that to maintain post-warm-up muscle temperature, an increase of the leg heating temperature from 40 to 43 °C is sufficient to virtually abolish the deep thigh muscle temperature drop.
Increasing muscle temperature at first improves performance ("warming up") then induces fatigue.
Though Ferguson et al. (2006) found no effect of increasing muscle temperature on energy turnover in dynamic exercise in a range of 34.2 38.3°C, ADP:O ratio has been shown to decrease at higher muscle temperatures (Brooks et al. 1971; Willis and Jackman 1994).
Therefore, these results indicate that, when using an optimised heating method, heating the calf in addition to the thigh does not further increase quadriceps muscle temperature, compared to heating the thigh only.
These results suggested that the increase in muscle temperature following the first sprint "cancelled" out the passive warm-up effect of the diurnal increase in central temperature on subsequent sprints.
Although this temperature effect is interesting and supports the positive dose/response relationship that exists between increases in muscle temperature and muscle power, 34 it is unlikely that the difference in muscle temperature between conditions in the current study would have been significantly large enough to induce a variation in peak RTD.
