Abstract
The aims of the present study were to characterize the effects of cycling in varying terrain with the assistance of an electric motor with respect to (1) power output, velocity, and electromyography (EMG) signals; (2) cardiorespiratory parameters; (3) energy expenditure (EE); (4) rate of perceived exertion (RPE) and enjoyment and to compare these effects with those of non-assisted cycling. Eight sedentary women (age: 38 ± 15 years, BMI: 25.3 ± 2.1 kg m−2) cycled 9.5 km on varying terrain (change in elevation: 102 m, maximum incline: 5.8 %) at their own pace, once with and once without motorized assistance, in randomized order. With electrical assistance, the mean power output (−29 %); EMG patterns of the m. biceps femoris (−49 %), m. vastus lateralis (−33 %), m. vastus medialis (−37 %), and m. gastrocnemius medialis (−29 %); heart rate (−29.1 %); oxygen uptake (−33.0 %); respiratory exchange ratio (−9.0 %); and EE (−36.5 %) were all lower, whereas the mean cycling speed was higher (P < 0.05) than that without such assistance. In addition, following assisted exercise the mean blood lactate concentration and RPE were lower (P < 0.05) and ratings of enjoyment higher (P < 0.05). Moreover, motorized cycling was associated with (1) lower EMG with higher power output and speed; (2) less cardiorespiratory and metabolic effort; (3) lower respiratory exchange ratio; (4) lower RPE with more enjoyment; and (5) sufficient EE, according to present standards, to provide health benefits. Thus, electrically assisted cycling may represent an innovative approach to persuading reluctant sedentary women to exercise.
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References
Achten J, Gleeson M, Jeukendrup AE (2002) Determination of the exercise intensity that elicits maximal fat oxidation. Med Sci Sports Exerc 34:92–97
Ainsworth BE, Haskell WL, Whitt MC, Irwin ML, Swartz AM, Strath SJ, O’Brien WL, Bassett DR Jr, Schmitz KH, Emplaincourt PO, Jacobs DR Jr, Leon AS (2000) Compendium of physical activities: an update of activity codes and MET intensities. Med Sci Sport Exerc 32:S498–S504
Berggren JR, Hulver MW, Dohm GL, Houmard JA (2004) Weight loss and exercise: implications for muscle lipid metabolism and insulin action. Med Sci Sports Exerc 36:1191–1195
Bergman BC, Brooks GA (1999) Respiratory gas-exchange ratios during graded exercise in fed and fasted trained and untrained men. J Appl Physiol 86:479–487
Borg G (1970) Perceived exertion as an indicator of somatic stress. Scand J Rehabil Med 2:92–98
Broeder CE, Brenner M, Hofman Z, Paijmans IJM, Thomas EL, Wilmore JH (1991) The metabolic consequences of low and moderate intensity exercise with or without feeding in lean and borderline obese males. Int J Obes 15:95–104
Brooks GA (1997) Importance of the ‘crossover’ concept in exercise metabolism. Clin Exp Pharmacol Physiol 24:889–895
Coggan AR, Kohrt WM, Spina RJ, Bier DM, Holloszy JO (1990) Endurance training decreases plasma glucose turnover and oxidation during moderate-intensity exercise in men. J Appl Physiol 68:990–996
Cohen J (1988) Statistical power analysis for the behavioral sciences. Lawrence Erlbaum Associates, Hillsdale
de Geus B, De Smet S, Nijs J, Meeusen R (2007) Determining the intensity and energy expenditure during commuter cycling. Br J Sports Med 41:8–12
Donnelly JE, Blair SN, Jakicic JM, Manore MM, Rankin JW, Smith BK (2009) American College of Sports Medicine Position Stand. Appropriate physical activity intervention strategies for weight loss and prevention of weight regain for adults. Med Sci Sports Exerc 41:459–471
Dudley GA, Tullson PC, Terjung RL (1987) Influence of mitochondrial content on the sensitivity of respiratory control. J Biol Chem 262:9109–9114
Girandola RN, Katch FI (1976) Effects of physical-training on ventilatory equivalent and respiratory exchange ratio during weight supported, steady-state exercise. Eur J Appl Physiol Occup Physiol 35:119–125
Gojanovic B, Welker J, Iglesias K, Daucourt C, Gremion G (2011) Electric bikes as a new active transportation modality to promote health. Med Sci Sports Exerc 43:2204–2210
Goodpaster BH, Katsiaras A, Kelley DE (2003) Enhanced fat oxidation through physical activity is associated with improvements in insulin sensitivity in obesity. Diabetes 52:2191–2197
Haskell WL, Lee IM, Pate RR, Powell KE, Blair SN, Franklin BA, Macera CA, Heath GW, Thompson PD, Bauman A (2007) Physical activity and public health: updated recommendation for adults from the American College of Sports Medicine and the American Heart Association. Circulation 116:1081–1093
Hendriksen IJ, Zuiderveld B, Kemper HC, Bezemer PD (2000) Effect of commuter cycling on physical performance of male and female employees. Med Sci Sports Exerc 32:504–510
Henriksson J (1977) Training induced adaptation of skeletal muscle and metabolism during submaximal exercise. J Physiol 270:661–675
Hermens HJE, Freriks BE (1999) Future applications of surface electromyography. Roessingh Research and Development, Enschede
Hurley BF, Nemeth PM, Martin WH, Hagberg JM, Dalsky GP, Holloszy JO (1986) Muscle triglyceride utilization during exercise: effect of training. J Appl Physiol 60:562–567
Jansson E, Kaijser L (1987) Substrate utilization and enzymes in skeletal muscle of extremely endurance-trained men. J Appl Physiol 62:999–1005
Jeukendrup AE, Saris WH, Wagenmakers AJ (1998) Fat metabolism during exercise: a review—part II: regulation of metabolism and the effects of training. Int J Sports Med 19:293–302
Jones NL, Heigenhauser GJ, Kuksis A, Matsos CG, Sutton JR, Toews CJ (1980) Fat metabolism in heavy exercise. Clin Sci (Lond) 59:469–478
Kelley DE, Goodpaster B, Wing RR, Simoneau JA (1999) Skeletal muscle fatty acid metabolism in association with insulin resistance, obesity, and weight loss. Am J Physiol 277:E1130–E1141
Kubukeli ZN, Noakes TD, Dennis SC (2002) Training techniques to improve endurance exercise performances. Sports Med 32:489–509
Romijn JA, Coyle EF, Sidossis LS, Gastaldelli A, Horowitz JF, Endert E, Wolfe RR (1993) Regulation of endogenous fat and carbohydrate metabolism in relation to exercise intensity and duration. Am J Physiol 265:E380–E391
Rose G (2012) E-bikes and urban transportation: emerging issues and unresolved questions. Transportation 39:81–96
Scanlan T, Lewthwaite R (1986) Social psychological aspects of competition for male youth sport participants: IV. Predictors of enjoyment. J Sport Psychol 8:25–35
Simoneau JA, Veerkamp JH, Turcotte LP, Kelley DE (1999) Markers of capacity to utilize fatty acids in human skeletal muscle: relation to insulin resistance and obesity and effects of weight loss. FASEB J 13:2051–2060
Simons M, Van Es E, Hendriksen I (2009) Electrically assisted cycling: a new mode for meeting physical activity guidelines? Med Sci Sports Exerc 41:2097–2102
Weinert J, Ma C, Cherry C (2007) The transition to electric bikes in China: history and key reasons for rapid growth. Transportation 34:301–318
Wilmore JH, Costill DL (1994) Physiology of sport and exercise. Human kinetics. Leeds, Champaign
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Communicated by Klaas R Westerterp.
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Sperlich, B., Zinner, C., Hébert-Losier, K. et al. Biomechanical, cardiorespiratory, metabolic and perceived responses to electrically assisted cycling. Eur J Appl Physiol 112, 4015–4025 (2012). https://doi.org/10.1007/s00421-012-2382-0
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DOI: https://doi.org/10.1007/s00421-012-2382-0