title: Neuromuscular, hormonal, and metabolic responses to different plyometric training volumes in rugby players.
abstract: The purpose of this study was to investigate the effect of different volumes of plyometric exercise (i.e., 100, 200, or 300 hurdle jumps) on acute strength and jump performance and on the acute hormonal and lactate responses in rugby players. Eleven young male elite rugby players (age, 23.5 ± 0.9 years; height, 173 ± 4.8 cm) volunteered for the study. Maximal isometric peak torque (PT), maximal rate of force development (RFD), squat jump (SJ), and drop jump (DJ) performance were assessed before and 5 minutes, 8 hours, and 24 hours after 100, 200, or 300 jumps. In addition, total testosterone (TT), cortisol (COR), and lactate were measured before and after the 3 different plyometric exercise volumes. There were significant decreases in the PT (p < 0.02) and maximal RFD (p < 0.001) 5 minutes, 8 hours, and 24 hours after 100, 200, and 300 jumps, with no differences between the exercise volumes. Additionally, there were significant decreases in the SJ (p < 0.001) and DJ (p < 0.01) performances 24 hours after 100, 200, and 300 jumps, with no differences between the exercise volumes. However, there were significant increases in the TT (p < 0.001), COR (p < 0.05), and lactate (p < 0.001) after 100, 200, and 300 jumps, with no differences between the exercise volumes. All plyometric exercise volumes (100, 200, and 300 jumps) resulted in similar neuromuscular, metabolic, and hormonal responses.
authors: 1Exercise Research Laboratory, Physical Education School, Federal University of Rio Grande do Sul, Porto Alegre, Brazil; 2Department of Health Sciences, University of Navarra, Tudela, Spain; and 3Department of Physical Education, Federal University of Vale do São Francisco, Petrolina, Brazil.
authors: Eduardo L
authors: EL
authors: Cadore
authors: Eraldo
authors: E
authors: Pinheiro
authors: Mikel
authors: M
authors: Izquierdo
authors: Cleiton S
authors: CS
authors: Correa
authors: Régis
authors: R
authors: Radaelli
authors: Jocelito B
authors: JB
authors: Martins
authors: Francisco L R
authors: FL
authors: Lhullier
authors: Orlando
authors: O
authors: Laitano
authors: Marcelo
authors: M
authors: Cardoso
authors: Ronei S
authors: RS
authors: Pinto
mesh_terms: D000328:Adult; D005080:Exercise Test; D005538:Football / Q000502:physiology*; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D019344:Lactic Acid / Q000097:blood; D008297:Male; D009068:Movement / Q000502:physiology; D053580:Muscle Strength / Q000502:physiology; D064797:Physical Conditioning, Human / Q000379:methods* / Q000502:physiology*; D059385:Plyometric Exercise; D013739:Testosterone / Q000097:blood; D019415:Torque; D055815:Young Adult
chemical_list: D019344:Lactic Acid; D013739:Testosterone; D006854:Hydrocortisone