The aim of the present study was to measure the effect of direct supervision by a strength and conditioning coach on elite strength training sessions for soccer junior players compared to self strength-trained subjects. Twenty-six young well-trained elite male soccer players aged (Mean ± SD) (19.1 ± 3.5 years), body mass (72.6 ± 7.8 kg) and stature (178.6 ± 7.8 cm) volunteered to participate in the present study. Subjects were divided into 3 groups, a supervised strength training group (N = 9), an unsupervised strength training group (N = 8) and a control group with no strength training (N = 9). A 10-week strength training program was developed and the supervised strength training group performed the program under the supervision of a strength and conditioning coach. The unsupervised strength training group performed the same training program with no supervision and the control group followed only the regular team soccer training. To measure the effect of the program and the supervision of a strength and conditioning coach, all subjects were tested on maximum strength in leg muscles (1RM) according to leg press, sprinting speed (10 m and 40 m) and jumping performance (countermovement jump). The analyses between groups showed that the supervised strength training group showed a significant increase in CMJ (2.6 ± 1.1 cm) and leg press (26.3 ± 7.9 kg) performance compared to the unsupervised strength training group. The supervised strength training group also showed a significant increase in 10 m (-0.05 ± 0.02 s), 40 m (-0.12 ± .03 s) and leg press (37.2 ± 9.0 kg) performances compared to the control group. The findings of the present study indicate that a strength training program directly supervised by a strength and conditioning coach over a period of 10 weeks led to a significant improvement compared to self-implemented strength training.
Periodization, coaching, strength and conditioning
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- Baker, D. (1996). Improving vertical jump performance through general, special, and specific strength training: A brief review. The Journal of Strength and Conditioning Research, 10 (2), 131-136.
- Baker, D., & Nance, S. (1999). The relation between running speed and measures of strength and power in professional rugby league players. The Journal of Strength and Conditioning Research, 13 (3), 230-235.
- Campos, G. E., Luecke, T. J., Wendeln, H. K., Toma, K., Hagerman, F. C., Murray, T. F., et al. (2002). Muscular adaptations in response to three different resistance-training regimens: specificity of repetition maximum training zones. European Journal of Applied Physiology, 88 (1-2), 50-60.
- Carlock, J. M., Smith, S. L., Hartman, M. J., Morris, R. T., Ciroslan, D. A., Pierce, K. C., et al. (2004). The relationship between vertical jump power estimates and weightlifting ability: a field-test approach. The Journal of Strength and Conditioning Research, 18 (3), 534-539.
- Coutts, A. J., Murphy, A. J., & Dascombe, B. J. (2004). Effect of direct supervision of a strength coach on measures of muscular strength and power in young rugby league players. The Journal of Strength and Conditioning Research, 18 (2), 316-323.
- Culver, D., & Trudel, P. (2006). Cultivating coaches’ communities of practice: Developing the potential for learning through interactions. In R. Jones (Ed.), The Sports Coach as Educator: Reconceptualising Sports Coaching (pp. 97-113). London: Routledge.
- Cushion, C. J., Armour, K. M., & Jones, R. L. (2003). Coach education and continuing professional development: Experience and learning to coach. Quest, 55 (3), 215-230.
- Douge, B., & Hastie, P. (1993). Coach effectiveness. Sports Science Review, 2, 14-29.
- Ericsson, K. A., & Charness, N. (1994). Expert performance: Its structure and acquisition. American Psychologist, 49 (8), 725-747.
- Fatouros, I. G., Jamurtas, A. Z., Leontsini, D., Taxildaris, K., Aggelousis, N., Kostopoulos, N., et al. (2000). Evaluation of plyometric exercise training, weight training, and their combination on vertical jumping performance and leg strength. The Journal of Strength and Conditioning Research, 14 (4), 470-476.
- Gallo, G. J., & De Marco, G. M., Jr. (2008). Self-assessment and modification of a division I strength and conditioning coach's instructional behavior. The Journal of Strength and Conditioning Research, 22 (4), 1228-1235.
- Hakkinen, K., Alen, M., Kallinen, M., Newton, R. U., & Kraemer, W. J. (2000). Neuromuscular adaptation during prolonged strength training, detraining and re-strength-training in middle-aged and elderly people. European Journal of Applied Physiology, 83 (1), 51-62.
- Hoff, J., Gran, A., & Helgerud, J. (2002). Maximal strength training improves aerobic endurance performance. Scandinavian Journal of Medicine and Science in Sports, 12 (5), 288-295.
- Hoff, J., & Helgerud, J. (2004). Endurance and strength training for soccer players: physiological considerations. Sports Medicine, 34 (3), 165-180.
- Hopkins, W. G., Hawley, J. A., & Burke, L. M. (1999). Design and analysis of research on sport performance enhancement. Medicine and Science in Sports and Exercise, 31 (3), 472-485.
- Magnusen, M. J., & Rhea, D. J. (2009). Division I athletes' attitudes toward and preferences for male and female strength and conditioning coaches. The Journal of Strength and Conditioning Research, 23 (4), 1084-1090.
- Massey, C. D., Maneval, M. W., Phillips, J., Vincent, J., White, G., & Zoeller, B. (2002). An analysis of teaching and coaching behaviors of elite strength and conditioning coaches. The Journal of Strength and Conditioning Research, 16 (3), 456-460.
- Mazzetti, S. A., Kraemer, W. J., Volek, J. S., Duncan, N. D., Ratamess, N. A., Gomez, A. L., et al. (2000). The influence of direct supervision of resistance training on strength performance. Medicine and Science in Sports and Exercise, 32 (6), 1175-1184.
- McCullick, B. A., Cumings, R., & DeMarco, G. M. (1998). The road to expert coaching. Georgia Association for Health, Physical Education, Recreation, and Dance, 32 (1), 47-49.
- Moore, E. W., Hickey, M. S., & Reiser, R. F. (2005). Comparison of two twelve week off-season combined training programs on entry level collegiate soccer players' performance. The Journal of Strength and Conditioning Research, 19 (4), 791-798.
- Nash, C., & Collins, D. (2006). Tacit knowledge in expert coaching: Science or art? Quest, 58 (4), 465-477.
- Rønnestad, B. R., Nymark, B. S., & Raastad, T. (2011). Effects of In-season strength maintenance training frequency in professional soccer players. The Journal of Strength and Conditioning Research, 25 (10), 2653-2660.
- Schempp, P., McCullick, B., & Mason, S. (2006). The development of expert coaching. In R. Jones (Ed.), The sports coach as educator: Re-conceptualising sports coaching (pp. 145-161). London: Routledge.
- Shalfawi, S. A., Sabbah, A., Kailani, G., Tonnessen, E., & Enoksen, E. (2011). The relationship between running speed and measures of vertical jump in professional basketball players: a field-test approach. The Journal of Strength and Conditioning Research, 25 (11), 3088-3092.
- Werner, G. (2010). Strength and conditioning techniques in the rehabilitation of sports injury. Clinical Journal of Sport Medicine, 29 (1), 177-191.
- Weyand, P. G., Sternlight, D. B., Bellizzi, M. J., & Wright, S. (2000). Faster top running speeds are achieved with greater ground forces not more rapid leg movements. Journal of Applied Physiology, 89 (5), 1991-1999.
- Wisløff, U., Castagna, C., Helgerud, J., Jones, R., & Hoff, J. (2004). Strong correlation of maximal squat strength with sprint performance and vertical jump height in elite soccer players. British Journal of Sports Medicine, 38 (3), 285-288.
- Woodman, L. (1993). Coaching: A science, an art, an emerging profession. Sport Science Review, 2 (2), 1-13.
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