Mean anaerobic power (W) = Total work (J) /Time (s) Assume: Total work = 15930J: Time = 30s working at a mean anaerobic power of 530 J.s-l or 530 W (since I J.s-1 = 1 W) over the duration of the test (Eq. 9.6b). Furthermore, mean anaerobic power, just like many of the variables described previously periaining to thl Wingate Anaerobic Test, may also be expressed relative to body weight (Eq. 9.6c). The relative rn"un unu"robic power for a person with a mean anaerobic power of 531 W and a body weight of 80 kg works out to 6.6 W.kg-1 (Eq. 9.6d). Assume.. Highest p = 708 W; Lowest p = 354 W Fatigue index = (70S W - 354 W) / 70g Wl x 100 = 50Vo Eq.9.7b Rrsur,rs AND DrscussroN High scores on the WAnT are meant to indicate high anaer_ obic fitness. Some of those anaerobic factors ,"port"dlyz associated with higher scores are (1) greater capacity to p-roduce lactic acid; (2) greater stores oi the phosphagens; (3) greater buffering capacity; and (4) a combination of greater motivation and greater torerance of discomfort. As mentioned in the introduction to this test, however, aerobic metabolism, thus aerobic fitness, plays a small but signifi_ cant part in this all-out exercise bout that lasts for 30 s. Although it would be impossible for persons to main- tain their peak or mean Wingate anaerobic power for an en_ tire minute. these anaerobic indices make fir an interesting comparison with minute_based power levels that are fre_ quently prescribed for aerobic cycle ergometry. For exam_ ple, 200 W might be considered a heavy aerobic intensity for typical males, whereas the mean anaerobic powers may range from 450 W25 to 563 W36 on the WAnT. The scores presented in Table 9.2 are for comparative purposes. They should not be used to classify people be_ cause they are not based upon large representative samples or equal force settings. Also, some studies may have used toe stirrups, which may increase peak and mean anaerobic power by 5*12 To.31 When comparing genders, there are large differences between average men and women when peak and mean anaerobic power are expressed in absolute terms, but these differences are reduced when expressed in relative terms of body mass or fat-free mass.35 The percentiles listed in Table 9.3 are based on men and women between the ages of 1g y arrd2g y at a force setting of 7.5 Vo BM. The average men,s and women,s peak anaerobic powers are about 700 W and 455 W, re_ spectively; their relative peak anaerobic powers are about Eq.9.6a Mean anaerobic power = l5 930 J / 30 s = 531 W Eq. 9.6b Relative mean anaerobic power (W.tg-r; = Mean anaerobic power (W) / Body wt (kg) Eq. 9.6c Assume: Mean anaerobic power = 531 W; Body wt = g0 kg Relative mean anaerobic power = 53l W / g0 kg = 6.6W.kg-1 Eq. 9.6d Fatigue fndex The fatigue index reflects the degree offatigue over the en_ tire WAnT. Those individuals exhibiting a-tigtrer fatigue index do so because they are unable to maintain their power level over the duration of the test due to a greater level of neuromuscular fatigue. The fatigue index is calculated as the percent decrease in power (p) from the highest power (usually recorded during the first 5 s interval) to the lowest power (usually the last 5 s interval), as seen in Equation 9.7a. A participant starting wirh a power of 70g W (highest power) during the first 5 s interval and ending with a plwer of 354 W (lowest power) in the last 5 s wo-rlO have a fa_ tigue index of 50 Vo, as seen in Equation 9.7b. Fatigue index (Vo) = [Highesr p (W) _ Lowest p (W) / Highest P (W)l x 100 Eq.93a Comparative Data for the Wingate Anaerobic Test Peak Anaerobic power r yv^ ^,,qe, vu,v ruwsr Mean Anaerobic power yf,f -ffi," Men Relative (w.kg{) Nonathletes (18y-2gy) 7.5 7oo g.2 16.9 56g Nonathletes (18y-2ag 7.s s4O a.2 13.s 450 Nonathletes (2sy-3H.yl z.F zoo g.2 16.2 040 Nonathletes (35y-44y) 7.s 660 8.6 1s.O 500 cyclists (category t-il) 10.0 1125 14.7 27.1 903 ?""i:T (catesory ll-lv) e'5 e63 18.3 2s.s 7Bs Nonathletes (18y-28y) 7.s 4s4 7.6 11.4 gB1 Active women l.s 561 9.0 13.6 453 7.3 7.0 7.2 6.6 11.8 10.8 6.3 7.2 Sources; Data from lnbar & Bar-Or (1 9SO)r.; .l".oO CHAPTER g Anaerobic Cycling 95