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Borges L.S.,State University of Southwest Bahia | Cerqueira M.S.,State University of Southwest Bahia | Dos Santos Rocha J.A.,State University of Southwest Bahia | Conrado L.A.L.,University Camilo Castelo Branco | And 4 more authors.
Lasers in Medical Science | Year: 2014

The goal of the present study was to determine the effect of light-emitting diode phototherapy (LEDT) at 630 nm on muscle recovery after a damaging eccentric exercise bout. Seventeen healthy young male volunteers, without previous experience with eccentric exercise, were included in a randomized double-blinded placebo-controlled trial. They were divided into a LEDT (n=8) and a PLACEBO group (n=9). To induce muscle damage, subjects performed 30 eccentric contractions with a load of 100 % of maximal voluntary isometric contraction strength of the elbow flexors of the non-dominant arm. LEDT group subjects received biceps brachii phototherapy (λ 630 nm; total energy density, 20.4 J/cm2) immediately after the exercise bout. The LEDT in the placebo group was aimed at the muscle, but it remained turned off. Isometric muscle strength, muscle soreness, and elbow range of motion (ROM) were measured before and at 24, 48, 72, and 96 h the after eccentric exercise bout and compared between groups. Our results showed that the muscle soreness, muscle strength loss, and ROM impairments were significantly reduced up to 96 h after a damaging eccentric exercise bout for the LEDT group compared with the PLACEBO group. A single LEDT (630 nm) intervention immediately after a damaging eccentric exercise bout was effective in terms of attenuating the muscle soreness and muscle strength loss and ROM impairments. © 2013 Springer-Verlag.


Do Carmo F.C.,Laboratory of Physiology and Biokinetic | Pereira R.,State University of Southwest Bahia | Pereira R.,University Camilo Castelo Branco | MacHado M.,Laboratory of Physiology and Biokinetic | MacHado M.,Universitary Foundation of Itaperuna
Isokinetics and Exercise Science | Year: 2011

The aim of this study was to assess how much risk a resistance exercise can provide to individuals who have distinguished hyperCKemia response. Twenty-three healthy men performed an exercise protocol, during which 4 sets of biceps curl were performed at 85% of 1 repetition maximum (1RM). Each bout was performed to voluntary fatigue and the workout volume completed was calculated. Subjects provided blood samples prior, and at 24, and 48 h following exercise to evaluate serum creatine kinase (CK) activity. Based on serum CK activity responses the subjects were separated into two groups called: Normal Responders (NR) or High Responders (HR). A great interindividual variability in serum CK activity following exercise and a significant difference between NR and HR were observed. The workout volume demonstrated a significant reduction along sets but without difference between NR and HR. Our main finding was the great inter-individual variability in serum CK activity that is seen even when using a single exercise performed on a the day-to-day basis. © 2011 - IOS Press and the authors. All rights reserved.


Amorim M.Z.,Laboratory of Physiology and Biokinetic | Machado M.,Laboratory of Physiology and Biokinetic | Machado M.,Universitary Foundation of Itaperuna | Machado M.,Iguacu University | And 4 more authors.
Journal of Physiological Sciences | Year: 2014

We investigated differences in sex responses in serum CK activity and renal function measured by glomerular filtration rate (GFR) after an exercise session. Twenty-two healthy and trained volunteers (11 males and 11 females) performed 17 resistance exercises with 3 × 12 repetitions in a circuit training fashion. Subjects provided blood samples prior to exercise session, and at 24, 48, and 72 h following exercise sessions for creatine kinase and creatinine. Twenty-four-hour urine samples were collected before and 72 h after the exercise. Estimate (e) GFR was obtained by using the Chronic Kidney Disease Epidemiology Collaboration equation adjusted for males and females. After the exercise session, males showed greater serum CK activity than females (p<0.02), serum creatinine increased 31.3 % for males and 29.8 % for females, and urinary creatinine decreased on average 5.4 % for males and 0.6 % for females, with no significant differences (p>0.05) between sex for serum and urinary creatinine. eGFR decreased significantly for males (~10 %) and females (~8 %), but also without a difference between the sexes (p<0.05). The correlation between CK and eGFR was significant for males (r = -0.794; p = 0.003), and females (r = -0.8875; p\0.001). A significant negative correlation between CK activity and the eGFR indice of renal function in both males and females was observed. Additionally, the renal function compromise was similar for both sexes, despite males presenting greater exercise-induced skeletal muscle damage when compared to females. © The Physiological Society of Japan and Springer Japan 2013.


Machado M.,Universitary Foundation of Itaperuna | Machado M.,Laboratory of Physiology and Biokinetic | Zini E.N.,Laboratory of Physiology and Biokinetic | Valadao S.D.,Laboratory of Physiology and Biokinetic | And 3 more authors.
International Urology and Nephrology | Year: 2012

The aim of study was to assess the correlation between the changes in serum CK activity after a resistance exercise and renal function measured by glomerular filtration rate (eGFR). Twenty-nine trained women (32 ± 10 years; 157 ± 4 cm; 58.8 ± 6.4 kg) performed a resistance exercise session with 17 exercises with 3 × 12 repetitions in a circuit training fashion. Subjects provided blood samples prior to exercise session (PRE), and at 24, 48, and 72 h following exercise session for creatine kinase (CK) and creatinine. 24-Urine samples were collected before and 72 h after exercises. eGFR was obtained by th three most recommended methods (MDRD; MCQE; Cockcroft-Gault). After the exercise session, serum CK activity increase up 1.68 times (P<0.01). Serum creatinine increased 25.5% (P = 0.0000) while urinary creatinine decreased on average 6.4% (P = 0.0422). eGFR decreased in all formulas: MDRD by 21.5%, MCQE by 14.2%, and C-G by 17% (all with P<0.01). Ccr also decreased (-22.9%, P<0.01). The index of correlation was significant for MDRD (r = -0.924; P<0.01), C -G (r = -0.884; P<0.01), and MQCE (r = -0.644; P<0.05). In conclusion, we observed a significant negative correlation between CK activity and the eGFR indices of renal function. © Springer Science+Business Media, B.V. 2011.

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