390 1455 Board #195 May 29, 9:00 AM - 10:30 AM The Effects of Active Recovery during Resistance Training on Lactate Clearance in Collegiate Athletes Christopher A. Perry, Louisa Summers, Jack Rutherford, Peter J. Chomentowski, III. Eastern Kentucky University, Richmond, KY. (No relationships reported) PURPOSE: With the development of more intense and complex strength and conditioning programs, it is necessary to discover the best possible means of recovery during workout sessions to increase athletic performance. The objective of this study is to evaluate the effects of active recovery during the rest periods of a resistance training session on lactate clearance in varsity collegiate athletes. METHODS: Twenty healthy varsity collegiate athletes age 18-22 yr participated in a collegiate strength and conditioning workout session. Participants were randomly divided into an active recovery group (A.R.) and a passive recovery group (P.R.). Both groups performed 5 exercises for 2 sets of 8 repetitions at 70% 1RM, with 3 minutes of recovery between each set. The exercises were performed in the following order: Power Clean, Barbell Squat, Barbell Bench Press, Barbell Bent-Over Row, and Kettlebell swings. A.R. consisted of cycling on a Monark cycle ergometer at minimum resistance at 60 rpm during each 3 minute rest period, while P.R. remained stationary for the duration of the rest period. The blood lactate levels were recorded during each 2 nd rest period utilizing finger prick blood analysis via Nova blood lactate analyzers. The changes in blood lactate were compared between A.R. and P.R. groups using a repeated measures ANOVA statistical analysis. RESULTS: The repeated measures ANOVA revealed no significant difference of blood lactate levels between groups overall during the workout session. However, the results yielded significant pairwise comparisons between groups during the power clean exercise circuit; p=.042, mean difference 2.95mmol. CONCLUSIONS: There were no significant differences between A.R and P.R. groups during the overall resistance training session, but significant differences between groups during power cleans, revealing that active recovery interventions may be beneficial if performed after more strenuous, full-body resistance training movements. 1456 Board #196 May 29, 9:00 AM - 10:30 AM Effects Of Foam Rolling v. Static Stretching On Recovery of Quadriceps and Hamstrings Force Ross M. Edmunds 1 , Andrew Dettelbach 1 , Julia Dito 1 , Alex Kirkpatrick 1 , Alexandra Parra 2 , Jessica Souder 1 , Trenton Stevenson 1 , Todd A. Astorino 1 . 1 California State University San Marcos, San Marcos, CA. 2 University of Southern California, Los Angeles, CA. (No relationships reported) Recent findings document efficacy of various myofascial release techniques including static and dynamic stretching, foam rolling, and massage therapy on muscle performance after exercise. Increased range of motion, decreased fatigue, and optimized performance are potential benefits of myofascial release techniques. PURPOSE: To compare effects of myofascial release techniques via foam roller (FR) application and static stretching (SS) on the recovery of quadriceps and hamstring force production after intense exercise. METHODS: Fourteen active men (mean age and BMI = 23.3 ± 3.0 yr and 25.0 ± 2.8 kg/m2) initially completed strength testing on an isokinetic dynamometer consisting of five repetitions of maximal unilateral knee extension (KE) and knee flexion (KF) at a contraction velocity equal to 60 degrees * sec-1. Seven days later, subjects performed a 1 h bout of intense lower extremity exercise and were randomly assigned to SS or FR treatment instituted immediately after exercise. Twenty four hours after this bout, muscle strength was reassessed. Subjects repeated the intense exercise protocol 7 d later at the same time of day and the other treatment was performed post-exercise. RESULTS: Results revealed a main effect of treatment on knee extension torque (p=0.001) and a trend for knee flexion torque (p=0.052). Post hoc analysis revealed that knee extension torque was lower in response to SS (190.6 ± 43.7 ft/lb) versus baseline (221.8 ± 31.2 ft/lb) or FR (208.8 ± 28.4 ft/lb). Compared to baseline, 94% of knee extension force was preserved in FR versus only 84% for SS. For knee flexion, 98% of baseline force was preserved after FR compared to 88% for SS. CONCLUSIONS: Application of myofascial release via foam roller after intense exercise may help to preserve muscle force on the day following exercise compared to traditional static stretching. 1457 Board #197 May 29, 9:00 AM - 10:30 AM Upper- And Lower- Body Strength Training Recovery In Male Adolescent Athletes Jermaine B. Mitchell, Robert L. Herron, Stephen J. Carter, Jared H. Hornsby, Phillip A. Bishop. University of Alabama, Tuscaloosa, AL. (No relationships reported) PURPOSE: Resistance training has become a major component in many adolescent athletes’ training regimens. Although training frequencies and short-term recovery guidelines have been established for adolescents, training recovery time between workouts of the same muscle groups is unknown. METHODS: Eighteen trained male high school athletes (ages 14-19 years) performed 3 sets to failure in bench press and back squat exercise with training recovery periods of 24, 48 and 72 hours in counterbalanced order. Full recovery was defined as meeting or exceeding the number of repetitions during baseline. RESULTS: Repeated-measures ANOVA revealed that during the bench press participants were unable to repeat baseline performance (rep number ± SD) (12.4 ± 2.4) at 24 hours (10.9 ± 2.7, P = .007). However, there were no differences at 48 (11.7 ± 2.3, P = .21) and 72 (11.9 ± 2.3, P = .37) hours post baseline. Recovery was achieved in the back squat at 24 hours (13.9 ± 3.9 baseline vs. 14.7 ± 4.7 at 24 hours, P = .40), 48 hours (15.8 ± 5.1, P = .032) and at 72 hours (17.8 ± 5.6, P = .004). For bench press 39% (at 24 hours), 56% (at 48 hours), and 44 % (at 72 hours) of the participants were recovered, whereas 56% (at 24 hours), 89% (at 48 hours), and 83% (at 72 hours) of the participants recovered from the back squat. CONCLUSIONS: Bench press may need additional recovery time (≥ 48 hours) to achieve optimal performance in young males participating in strength training. However, it appears that 24 hours was sufficient time to recover from back squat exercise 1458 Board #198 May 29, 9:00 AM - 10:30 AM Effects of Two Different Active Recovery Modes During High-intensity Interval Training Anelita HM Del Vecchio, Fabricio B. Del Vecchio, Marlos R. Domingues. Superior School of Physical Education, Pelotas, Brazil. (No relationships reported) PURPOSE: To assess the effects of two active recovery (AR) modes on the physiological responses and efforts following high-intensity interval training (HIIT) in subjects with distinct aerobic fitness. METHODS: A counterbalanced study with repeated measures included 25 men. Anthropometric measures, heart rate (HR), blood lactate (LAC) and blood pressure were collected. A cycling maximal test was used to establish power (PMAX) and, 15 minutes later, time to exhaustion test (TLim at 120% PMAX). To evaluate recovery, two bouts of four efforts were performed during a HIIT session (30 seconds, 60 rpm at 120% of PMAX, followed by 30 seconds of recovery) and TLim after HIIT. Between each effort, the subjects were assigned to either recover pedaling (active bike recovery - ABR) or doing core exercises (active core recovery - ACR). The statistical analysis was done by two-way Anova with repeated measures RESULTS: There was no difference in TLim comparing fitness level (low cardiorrespiratory fitness = 118+/-25s to ACR and 110+/-24s to ABR; high cardiorrespiratory fitness = 142+/- 62s to ACR and 134+/-72s to ABR). The ABR resulted in lower LAC values, but only after the second bout of efforts (low fitness: 3.6+/-0.7mmol/L with ACR and 2.9+/-0.9mmol/L with ABR; high fitness: 3.2+/-0.5mmol/L with ACR and 2.8+/-0.6mmol/L with ABR, p=.01). The ACR lowered significantly the HR before first and second HIIT efforts, and before TLim (p=.001). CONCLUSIONS: There was no difference according to fitness level or recovery mode in TLim after HIIT. The ABR resulted in higher LAC removal and the ACR lowered HR during recovery between efforts. Copyright © 2014 by the American College of Sports Medicine. Unauthorized reproduction of this article is prohibited.