Upper-limb Power Test in Rock-climbing

Abstract

The goal of the present study was to validate a new ecological power-test on athletes of different levels and to assess rock climbers’ profiles (boulderers vs. route climbers). 34 athletes divided into novice, skilled and elite groups performed the arm-jump board test (AJ). Power, time, velocity, and efficiency index were recorded. Validity was assessed by comparing the distance with the value extracted from the accelerometer (500 Hz) and the reliability of intra- and inter-session scores. Moreover, a principal component analysis (PCA) was used to assess the climbers’ profiles. The AJ test was quite valid, showing a low systematic bias of −0.88 cm (−1.25%) and low limits of agreement (<6%), and reliable ( Intra-class correlation coefficient=0.98 and CV<5%), and was able to distinguish between the 3 samples (p<0.0001). There was a good correlation between relative upper-limb power (r=0.70; p<0.01) and the AJ score. Moreover, the PCA revealed an explosive profile for boulderers and either a weak and quick or slow profile for route climbers, revealing a biomechanical signature of the sub-discipline. The AJ test provides excellent absolute and relative reliabilities for climbing, and can effectively distinguish between climbing athletes of different competitive levels. Thus, the AJ may be suitable for field assessment of upper limb strength in climbing practitioners.

Key words

field testing - training and testing - ecological validity - bouldering - routes - upper-limb test

• References

• 1 Atkinson G, Reilly T. Circadian variation in sports performance. Sports Med 1996; 21: 292-312
• 2 Berrostegieta JI. Relation between specific force tests and chained degree in high level sport climbers. Engin Sport 2006; 6: 275-280
• 3 Bland JM, Altman DG. A note on the use of the intra-class correlation coefficient in the evaluation of agreement between two methods of measurement. Comput Biol Med 1990; 20: 337-340
• 4 Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1986; 1: 307-310
• 5 Casartelli N, Muller R, Maffiuletti NA. Validity and reliability of the Myotest accelerometric system for the assessment of vertical jump height. J Strength Cond Res 2010; 24: 3186-3193
• 6 Crewther BT, Kilduff LP, Cunningham DJ, Cook C, Owen N, Yang GZ. Validating two systems for estimating force and power. Int J Sports Med 2011; 32: 254-258
• 7 Donner A, Eliasziw M. Sample size requirements for reliability studies. Stat Med 1987; 6: 441-448
• 8 Draper N, Dickson T, Blackwell G, Priestley S, Fryer S, Marshall H, Shearman J, Hamlin M, Winter D, Ellis G. Sport-specific power assessment for rock climbing. J Sports Med Phys Fitness 2011; 51: 417-425
• 9 Espana-Romero V, Jensen RL, Sanchez X, Ostrowski ML, Szekely JE, Watts PB. Physiological responses in rock climbing with repeated ascents over a 10-week period. Eur J Appl Physiol 2012; 112: 821-828
• 10 Fanchini M, Violette F, Impellizzeri FM, Maffiuletti NA. Differences in climbing-specific strength between boulder and lead rock climbers. J Strength Cond Res 2013; 27: 310-314
• 11 Giles LV, Rhodes EC, Taunton JE. The physiology of rock climbing. Sports Med 2006; 36: 529-545
• 12 Grant S, Shields C, Fitzpatrick V, Loh WM, Whitaker A, Watt I, Kay JW. Climbing-specific finger endurance: a comparative study of intermediate rock climbers, rowers and aerobically trained individuals. J Sports Sci 2003; 21: 621-630
• 13 Harriss DJ, Atkinson G. Update – Ethical standards in sport and exercise science research: 2014 Update. Int J Sports Med 2013; 34: 1025-1028
• 14 Kollias I, Hatzitaki V, Papaiakovou G, Giatsis G. Using principal components analysis to identify individual differences in vertical jump performance. Res Q Exerc Sport 2001; 72: 63-67
• 15 Köstermeyer G. Determination, importance and practise the local muscular endurance of the finger flexors in sport climbing. Ed Neuried: Ars Ulna University, Erlangen, Nürnberg: 2000.
• 16 MacDonald JH, Callender N. Athletic profile of highly accomplished boulderers. Wilderness Environ Med 2011; 22: 140-143
• 17 Magiera A, Roczniok R, Maszczyk A, Czuba M, Kantyka J, Kurek P. The Structure of Performance of a Sport Rock Climber. J Hum Kin 2013; 36: 107-117
• 18 Marfell-Jones M, Olds T, Stewart AD, Carter L. International Standards for Anthropometric Assessment . Potchefstroom (South Africa): International Society for the Advancement of Kinanthropometry (ISAK) 2006; 61-75
• 19 Mermier CM, Janot JM, Parker DL, Swan JG. Physiological and anthropometric determinants of sport climbing performance. Br J Sports Med 2000; 34: 359-365
• 20 Michailov ML, Mladenov LV, Schoffl VR. Anthropometric and strength characteristics of world-class boulderers. Med Sport 2009; 13: 231-238
• 21 Padulo J, Mignogna P, Mignardi S, Tonni F, D’Ottavio S. Effect of different pushing speeds on bench press. Int J Sports Med 2012; 33: 376-380
• 22 Sale DG. Neural adaptation to resistance training. Med Sci Sports Exerc 1988; (Suppl) 135-145
• 23 Sanchez X, Lambert P, Jones G, Llewellyn DJ. Efficacy of pre-ascent climbing route visual inspection in indoor sport climbing. Scand J Med Sci Sports 2012; 22: 67-72
• 24 Sheel AW. Physiology of sport rock climbing. Br J Sports Med 2004; 38: 355-359
• 25 Stone M, Plisk S, Collins D. Training principles: evaluation of modes and methods of resistance training – a coaching perspective. Sports Biomech 2002; 1: 79-103
• 26 Vigouroux L, Quaine F. Fingertip force and electromyography of finger flexor muscles during a prolonged intermittent exercise in elite climbers and sedentary individuals. J Sports Sci 2006; 24: 181-186
• 27 Wagner LL, Evans SA, Weir JP, Housh TJ, Johnson GO. The Effect of Grip Width on Bench Press Performance. J Appl Biomec 1992; 8: 1-10
• 28 Watts PB. Physiology of difficult rock climbing. Eur J Appl Physiol 2004; 91: 361-372
• 29 Watts PB, Drobish KM. Physiological responses to simulated rock climbing at different angles. Med Sci Sports Exerc 1998; 30: 1118-1122
• 30 Watts PB, Jensen RL, Gannon E, Kobeina R, Maynard J, Sansom J. Forearm EMG during rock climbing differs from EMG during handgrip dynamometry. Int J Exer Sci 2008; 1: 2
• 31 Watts PB, Joubert LM, Lish AK, Mast JD, Wilkins B. Anthropometry of young competitive sport rock climbers. Br J Sports Med 2003; 37: 420-424
• 32 Watts PB, Martin DT, Durtschi S. Anthropometric profiles of elite male and female competitive sport rock climbers. J Sports Sci 1993; 11: 113-117
• 33 White DJ, Olsen PD. A time motion analysis of bouldering style competitive rock climbing. J Strength Cond Res 2010; 24: 1356-1360