Search Results

You are looking at 61 - 70 of 144 items for :

  • "peak power output" x
Clear All
Restricted access

Michail Lubomirov Michailov, Audry Morrison, Mano Mitkov Ketenliev and Boyanka Petkova Pentcheva

Traditional treadmill or bicycle ergometry neglects the upper-body musculature that predominantly limits or terminates rock-climbing performance (ie, the inability to continually pull up one’s body mass or “hang on”).

Purpose:

To develop an incremental maximal upper-body ergometer test (UBT) to evaluate climbers’ aerobic fitness and sport-specific work capacity and to compare these results with a traditional treadmill protocol.

Methods:

Eleven elite sport climbers (best redpoint grade Fr.8b) performed a UBT on a vertically mounted rowing ergometer and, on a separate occasion, performed a maximal incremental treadmill test (TMT). Cardiorespiratory parameters were measured continuously. Lactate (La) samples were collected.

Results:

Peak oxygen consumption (VO2peak) and heart rate in UBT and TMT were 34.1 ± 4.1 vs 58.3 ± 2.6 mL · min−1 · kg−1 and 185 ± 8 vs 197 ± 8 beats/min, respectively, and both variables were of significantly lower magnitude during UBT (P < .001). End-of-test La levels for UBT (11.9 ± 1.7 mmol/L) and TMT (12.3 ± 2.5 mmol/L) were similar (P = .554). Treadmill VO2peak was not correlated with either upper-body (UB) VO2peak (P = .854) or redpoint and on-sight climbing grade ability (P > .05). UB VO2peak and peak power output per kg body mass were both strongly correlated (P < .05) with climbing grade ability. The highest correlation coefficient was calculated between current on-sight grade and UB VO2peak (r = .85, P = .001).

Conclusion:

UBT aerobic- and work-capacity results were strongly correlated to climbing-performance variables and reflected sport-specific fatigue, and TMT results were not. UBT is preferred to TMT to test and monitor dedicated and elite rock climbers’ training status.

Restricted access

Peter M. Christensen and Jens Bangsbo

Purpose:

To evaluate the influence of warm-up exercise intensity and subsequent recovery on intense endurance performance, selected blood variables, and the oxygen-uptake (VO2) response.

Methods:

Twelve highly trained male cyclists (VO2max 72.4 ± 8.0 mL · min−1 · kg−1, incremental-test peak power output (iPPO) 432 ± 31 W; mean ± SD) performed 3 warm-up strategies lasting 20 min before a 4-min maximal-performance test (PT). Strategies consisted of moderate-intensity exercise (50%iPPO) followed by 6 min of recovery (MOD6) or progressive high-intensity exercise (10–100%iPPO and 2 × 20-s sprints) followed by recovery for 6 min (HI6) or 20 min (HI20).

Results:

Before PT venous pH was lower (P < .001) in HI6 (7.27 ± 0.05) than in HI20 (7.34 ± 0.04) and MOD6 (7.35 ± 0.03). At the same time, differences (P < .001) existed for venous lactate in HI6 (8.2 ± 2.0 mmol/L), HI20 (5.1 ± 1.7 mmol/L), and MOD6 (1.4 ± 0.4 mmol/L), as well as for venous bicarbonate in HI6 (19.3 ± 2.6 mmol/L), HI20 (22.6 ± 2.3 mmol/L), and MOD6 (26.0 ± 1.4 mmol/L). Mean power in PT in HI6 (402 ± 38 W) tended to be lower (P = .11) than in HI20 (409 ± 34 W) and was lower (P = .007) than in MOD6 (416 ± 32 W). Total VO2 (15–120 s in PT) was higher in HI6 (8.18 ± 0.86 L) than in HI20 (7.85 ± 0.82 L, P = .008) and MOD6 (7.90 ± 0.74 L, P = .012).

Conclusions:

Warm-up exercise including race-pace and sprint intervals combined with short recovery can reduce subsequent performance in a 4-min maximal test in highly trained cyclists. Thus, a reduced time at high exercise intensity, a reduced intensity in the warm-up, or an extension of the recovery period after an intense warm-up is advocated.

Restricted access

Twan ten Haaf, Selma van Staveren, Danilo Iannetta, Bart Roelands, Romain Meeusen, Maria F. Piacentini, Carl Foster, Leo Koenderman, Hein A.M. Daanen and Jos J. de Koning

increased 40 W for men and 30 W for women every 3 minutes. Subjects cycled at a freely chosen cadence. The test was stopped when subjects were unable to maintain the cadence above 60 rpm, despite strong verbal encouragement. Peak power output was defined as the average power output over the last 3 minutes

Open access

Seiichiro Takei, Kuniaki Hirayama and Junichi Okada

maximized at 1RM. However, previous studies have reported that submaximal loads are optimal for peak power output during HPC. 6 – 10 There are 2 possible explanations for these results. First, the movement might not be executed correctly at heavy loads. Because it is not easy to perform ballistic exercises

Open access

Emma L. Sweeney, Daniel J. Peart, Irene Kyza, Thomas Harkes, Jason G. Ellis and Ian H. Walshe

 < .05). Exercise Peak power output during each of the 30-s sprints is outlined in Table  2 . Peak power output did not differ between conditions ( p  = .644), but a difference was observed over time ( p  < .001), with peak power output significantly higher in the first sprint compared with the third

Restricted access

Yasuki Sekiguchi, Erica M. Filep, Courteney L. Benjamin, Douglas J. Casa and Lindsay J. DiStefano

method in 39°C and 56% RH for 8 d. Adaptations in plasma volume, HR, T int , T skin , and sweat loss were measured by heat stress test prior to and following heat acclimation. HST was consisted of 60 min at 35% of peak power output in 39°C and 53% RH. EUH (1.4% BML) and DEH (2.4% BML) groups performed

Restricted access

Bruno Ferreira Viana, Flávio Oliveira Pires, Allan Inoue and Tony Meireles Santos

Cross-country mountain biking (XCO) is a high-intensity endurance sporting event 1 , 2 in which athletes are required to generate power-output values ranging from ∼50 to 400 W. In fact, mean power output has been shown to be around 208 W, while peak power output has been shown to be as high as

Restricted access

Adam Beard, John Ashby, Ryan Chambers, Franck Brocherie and Grégoire P. Millet

 = .12; η p 2 = .08 ) throughout the protocol. Figure 1 —PPO in successive sprints during the repeated-cycling sprint test before and after specific RSH or RSN. Values are mean (SD). Significant differences from pretest, * P  < .05, ** P  < .01, *** P  < .001. PPO indicates peak power output; RSH

Restricted access

Sandro Venier, Jozo Grgic and Pavle Mikulic

Metikos et al 22 who previously validated this test. During these “all-out” strokes, peak power output was the highest external power output, as displayed on the Concept 2 performance monitor. The CV for this outcome amounted to 2.5%. Side Effects Immediately after the completion of the testing sessions

Restricted access

Christopher J. Keating, Juan  Á. Párraga Montilla, Pedro Á. Latorre Román and Rafael Moreno del Castillo

; Iellamo et al., 2014 ), one study utilized VO 2 peak ( Mitranun et al., 2014 ), one study utilized peak power output ( Currie et al., 2013 ), one utilized rate of perceived exertion ( Cassidy et al., 2016 ), one study utilized VO 2 reserve ( Terada et al., 2013 ), and one study utilized estimated safe