Affiliations: [a] Exercise and Sport Sciences Program, University of
Tulsa, Tulsa, OK, USA | [b] Department of Chemistry & Biochemistry,
University of Tulsa, Tulsa, OK, USA | [c] Department of Biology, University of Tulsa, Tulsa, OK,
USA
Note: [] Address for correspondence: John F. Caruso, Ph.D., 312 Chapman
Hall, 600 S. College Avenue, The University of Tulsa, Tulsa, OK 74104, USA.
Tel.: +1 918 631 2924; Fax: +1 918 631 2068; E-mail: john-caruso@utulsa.edu
Abstract: To assess blood lactate and performance variables obtained from
high-speed exercise performed on a device (Impulse Training Systems; Newnan GA)
that imposes loads without gravitational resistance, subjects
(n = 45) completed two tonic and two phasic workouts. Each
high-speed workout entailed two 60-second sets of seated knee- and
hip-extension repetitions separated by a 90-second rest period. Pre- and five
minutes post-exercise, lactate concentration was measured from a fingertip
blood drop with a calibrated analyzer (Accusport, Sports Resource Group,
Hawthorne, NY). Mean blood lactate values were compared with a 2(contractile
mode: tonic, phasic) × 2(time)
× 2 (gender) ANOVA, with repeated measures applied to
workout mode and time. Resistance exercise performance variables were assessed
with 2 (contractile mode: tonic, phasic) × 2 (gender)
ANOVAs. With α ⩽ 0.05, results
showed a time (post > pre) effect for blood lactate.
Exercise performance values were impacted by workout mode and gender, yet those
independent variables had no impact on blood lactate. Results concur with prior
resistance exercise studies that show significant blood lactate increases over
time. Additional inquiry is warranted as to why gender and workout mode
influenced resistance exercise performance variables, but did not impact blood
lactate.
