title: Physiological and neuromuscular profile during a bodypump session: acute responses during a high-resistance training session.
abstract: The main purposes of this study were 1) to describe and to compare blood lactate ([La]), heart rate (HR), and electromyographic (EMG) parameters during high-repetition training sessions (HRTSs), 2) to analyze the influence of physical fitness levels in these parameters, and, 3) to analyze the relationship between metabolic ([La]) and neuromuscular (EMG) responses during the HRTS. Fifteen healthy untrained women (21.7 +/- 2.1 years) performed an HRTS called Bodypump for 1 hour, which incorporated the use of variable free weights and high repetitions in a group setting. This session involved 10 music selections (M1-M10) containing resistive exercises for different muscle groups. After music selections 2 (M2), 4 (M4), 6 (M6), 7 (M7), and 9 (M9), [La], HR, and EMG (vastus medialis [VM], vastus lateralis [VL], iliocostalis lumborum [IC], and longissimus thoracis <) were determined. The [La] (M2, 4.00 +/- 1.45 mM; M7, 5.02 +/- 1.73 mM) and HR (M2, 153.64 +/- 18.89 bpm; M7, 16.14 +/- 20.14 bpm) obtained at M2 and M7 were similar but were significantly higher than the other moments of the session. However, EMG (root mean square [RMS]) at M2 (VL, VM, and LT) was lower than at M7. There was no significant correlation of strength and aerobic physical fitness with [La], RMS. In the same way, there was no significant correlation of [La] with RMS at M2 and M7. On the basis of our data, we can conclude that metabolic, cardiovascular, and EMG variables present different and independent behavior during an HRTS. Accordingly, for neuromuscular conditions during HRTS, it seems to be enough to induce improvement in the muscular strength of inferior limbs in untrained subjects.
authors.affiliation: Biomechanics Laboratory, Biosciences Institute, São Paulo State University, São Paulo, Brazil. andcast@rc.unesp.br
authors.forename: Anderson Souza
authors.initials: AS
authors.lastname: Oliveira
authors.forename: Camila Coelho
authors.initials: CC
authors.lastname: Greco
authors.forename: Marcelo Pinto
authors.initials: MP
authors.lastname: Pereira
authors.forename: Tiago Rezende
authors.initials: TR
authors.lastname: Figueira
authors.forename: Vinícius Daniel
authors.initials: VD
authors.lastname: de Araújo Ruas
authors.forename: Mauro
authors.initials: M
authors.lastname: Gonçalves
authors.forename: Benedito Sérgio
authors.initials: BS
authors.lastname: Denadai
mesh_terms: D000328:Adult; D015308:Anaerobic Threshold; D004576:Electromyography; D005260:Female; D006339:Heart Rate; D006801:Humans; D007537:Isometric Contraction; D019344:Lactic Acid / Q000097:blood; D018482:Muscle, Skeletal / Q000502:physiology*; D010809:Physical Fitness; D055070:Resistance Training; D055815:Young Adult
chemical_list: D019344:Lactic Acid