Introduction Several studies showed the effects of combined strength and endurance training on endurance performance and running economy (RE). However, few studies investigated specifically the effects of eccentric strength training. Aim of this research was to measure variation of RE after a combined eccentric strength-endurance training versus low or high intensity endurance training programs. Methods Twenty-nine well trained recreational runners (average age 35-55y; V’O2max around 50 ml/min/kg) were randomized in 3 training programs: combined eccentric strength-endurance (EST), low intensity endurance (LIT), high intensity training (HIT). Each group performed 8-week of training, 3 times a week; training volume (time x intensity) was accurately equalized among the groups. Reference Velocity (RV) as the medium speed between the first and the second ventilatory threshold was used to identify individual training intensity. RV ranged 95-140% for HIT and 70-105% for LIT and EST groups respectively. EST group, in addition to LIT program, performed once a week, 4 sets of 7 repetitions of Yo-Yo Leg Press (Yo-Yo Technology Stockholm Sweden). Before and after training each runner underwent metabolic measurements (Cosmed Quark, Italy) on a treadmill for determination of V’O2max and RE at three submax steady state speeds. Lower Limb Free Fat Mass (LLFFM) were measured by DXA (Holometric, USA) and leg-press 1RM (Technogym, Italy). Data were analysed by two way ANOVA and significance level was set at p<0.05. Results The combined endurance and strength training (EST group) produced significant improvements in RE (pre 4.5±0.3 J/m, post 4.3±0.4 J/m (p ≤ .05) and 1RM leg press (pre 143.8±35.8 kg, post 162.4±37.3kg (p ≤ .05) while no change in RE was found in HIT (pre: 4.6±0.3, post 4.6±0.4 J/m-1) and in LIT (pre: 4.2±0.5, post 4.2±0.3). V’O2max and LLFFM. Did not show significant modification in any groups. Discussion The data from the present study show a significant increase of muscle strength with associated reduction of RE in EST group with no concomitant changes in the V’O2max and in the lower limb muscle mass. These adaptations seem to indicate that short duration eccentric training (one bout/week for about 20min) produces changes in structural muscle characteristics (fibers, architecture) and intra and inter muscular coordination allowing a reduction in RE in well trained recreational runners without any reduction in aerobic power. References Turner, AM, Owings, M, and Schwane, JA. J Strength Cond Res 17: 60–67, 2003. Tesch PA & HE Berg. Int J Sports Med 18:S322-324 (Suppl 4), 1997. Piacentini MF, De Ioannon G, Comotto S, Spedicato A, Vernillo G, La Torre A. J Strength Cond Res. 2013 Aug;27(8):2295-303 luca.festa@me.com

EFFECTS OF ECCENTRIC STRENGTH TRAINING IN RUNNING ECONOMY OF RECREATIONAL ENDURANCE RUNNERS / L. Festa, C. Tarperi, A. La Torre, F. Schena - In: Book of abstracts of the 20th Annual Congress of the European College of Sport Science / ] A. Radmann, S. Hedenborg, E. Tsolakidis ; [a cura di] ] A. Radmann, S. Hedenborg, E. Tsolakidis. - [s.l] : Malmö University, Lund University & Copenhagen University, 2015 Jul. - ISBN 978-91-7104-567-6. - pp. 582-582 (( Intervento presentato al 20^. convegno Annual Congress of the European College of Sport Science tenutosi a Malmö nel 2015.

EFFECTS OF ECCENTRIC STRENGTH TRAINING IN RUNNING ECONOMY OF RECREATIONAL ENDURANCE RUNNERS

A. La Torre;
2015

Abstract

Introduction Several studies showed the effects of combined strength and endurance training on endurance performance and running economy (RE). However, few studies investigated specifically the effects of eccentric strength training. Aim of this research was to measure variation of RE after a combined eccentric strength-endurance training versus low or high intensity endurance training programs. Methods Twenty-nine well trained recreational runners (average age 35-55y; V’O2max around 50 ml/min/kg) were randomized in 3 training programs: combined eccentric strength-endurance (EST), low intensity endurance (LIT), high intensity training (HIT). Each group performed 8-week of training, 3 times a week; training volume (time x intensity) was accurately equalized among the groups. Reference Velocity (RV) as the medium speed between the first and the second ventilatory threshold was used to identify individual training intensity. RV ranged 95-140% for HIT and 70-105% for LIT and EST groups respectively. EST group, in addition to LIT program, performed once a week, 4 sets of 7 repetitions of Yo-Yo Leg Press (Yo-Yo Technology Stockholm Sweden). Before and after training each runner underwent metabolic measurements (Cosmed Quark, Italy) on a treadmill for determination of V’O2max and RE at three submax steady state speeds. Lower Limb Free Fat Mass (LLFFM) were measured by DXA (Holometric, USA) and leg-press 1RM (Technogym, Italy). Data were analysed by two way ANOVA and significance level was set at p<0.05. Results The combined endurance and strength training (EST group) produced significant improvements in RE (pre 4.5±0.3 J/m, post 4.3±0.4 J/m (p ≤ .05) and 1RM leg press (pre 143.8±35.8 kg, post 162.4±37.3kg (p ≤ .05) while no change in RE was found in HIT (pre: 4.6±0.3, post 4.6±0.4 J/m-1) and in LIT (pre: 4.2±0.5, post 4.2±0.3). V’O2max and LLFFM. Did not show significant modification in any groups. Discussion The data from the present study show a significant increase of muscle strength with associated reduction of RE in EST group with no concomitant changes in the V’O2max and in the lower limb muscle mass. These adaptations seem to indicate that short duration eccentric training (one bout/week for about 20min) produces changes in structural muscle characteristics (fibers, architecture) and intra and inter muscular coordination allowing a reduction in RE in well trained recreational runners without any reduction in aerobic power. References Turner, AM, Owings, M, and Schwane, JA. J Strength Cond Res 17: 60–67, 2003. Tesch PA & HE Berg. Int J Sports Med 18:S322-324 (Suppl 4), 1997. Piacentini MF, De Ioannon G, Comotto S, Spedicato A, Vernillo G, La Torre A. J Strength Cond Res. 2013 Aug;27(8):2295-303 luca.festa@me.com
eccentric training, economy, endurance
Settore M-EDF/02 - Metodi e Didattiche delle Attivita' Sportive
lug-2015
Book Part (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/290008
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact