Background: A high intensity strength training session has been able to negatively influence the athletes state of humor. However, it is unclear whether the low intensity blood flow
restriction method (LIBFR) may alter the mood state. Thus, the aim of this study was to compare the acute effect of LIBFR and the traditional method (TM) on the mood state of basketball players.
Methods: This is a quasi-experimental, randomized and crossover study.The sample consisted of 11 trained basketball players with age (19.9 ± 2.8 years), height (180.8 ± 7.8 cm) body
mass index (22.1 ± 1.9 kg/m2). The subjects underwent three sessions with a 7 days interval between the experimental sessions. At the 1st session were held anthropometric measurements, prescription of
blood flow restriction, 1RM test, familiarization with exercise and metronome; the 2nd and 3rd session experimental, was performed the squat exercise in LIBFR or TM. The methods have been standardized
by the total work, the TM condition performed 3 sets of 10 repetitions at 75% of 1RM with 2 minutes break and LIBFR 4 series of (30,15,15,15) repetitions to 30%1RM, 80RFS% and 30 second interval, both
with execution speed of 2 sec for each execution phase, concentric and excentric. The prescription of the blood flow restriction technique was performed using as phygmomanometer attached to the
proximal thigh being inflated to a point where that the auscultatory pulse verified by vascular doppler positioned over the posterior tibial artery was interrupted. The mood state profile (MSP) was
measured by the Brunel mood scale (BRUMS), and were analyzed the positive (force) and negative (tension, depression, anger, fatigue and confusion) domain sand the score of MSP, before and immediately
after the session.The score calculation for MSP is equal to positive domain - negative domains. To compare the measurements of mood state was used the independent t test.
Results: The tension, depression, anger and confusion domains, showed no significant difference between and with in groups (p>0.05). The force domain showed a significant difference
between the moments before and after (p = 0.002) for LIBFR, however there was no difference between LIBFR and TM. Regarding the fatigue domain, the LIBFR and the TM presented significant increase in
pre and post. In addition LIBFR showed a greater change in relation to TM. The MSP score only presented significant difference in the LIBFR in the pre and post moments.
Conclusions: It is concluded that the LIBFR had greater acute changes to the domains of MSP, being able to negatively influence the MSP score in athletes.