www.scholarsresearchlibrary.com t Available online a Scholars Research Library Annals of Biological Research, 2012, 3 (7):3357-3366 (http://scholarsresearchlibrary.com/archive.html) ISSN 0976-1233 CODEN (USA): ABRNBW 3357 Scholars Research Library Balance Performance on Balance Error Scoring System after Aerobic, Anaerobic, Mixed, Prolonged Intermittent, and Supramaximal Intermittent Exercises Amir Sarshin *1 , Hossein Babaei Por 2 , Mahboobeh Sedighi 3 , Seyed Alireza Miri 4 1 Faculty of Physical Education and Sport Science, Karaj Branch, Islamic Azad University, Karaj, Iran 2 Department of Physical Education and Sport Sciences, Vali-e-Asr University of Rafsanjan, Iran 3 Education office Rafsanjan, Kerman, Iran 4 Faculty of Physical Education and Sport Science, Central Tehran Branch, Islamic Azad University, Karaj, Iran _____________________________________________________________________________________________ ABSTRACT The purpose of the present research was to study balance performance on balance error scoring system after exercises with different intensities and durations. 15 soccer players participated in the research (21.66 ± 0.98 years of age, 68.45 ± 6.77 kg of weight, and 172.42 ± 6.15 cm of height). First the Conconi test and the variables related to aerobic exercise (running at 15 bpm below anaerobic threshold), anaerobic exercise (running with 110% of anaerobic threshold heart rate), mixed exercise (aerobic and anaerobic 72-second runs until exhaustion without rest), prolonged intermittent (20 s of running with 103% of anaerobic threshold heart rate and 20 seconds of rest for 30 minutes), supramaximal intermittent exercise (6-second runs with the average speed in 60-meter running and 40- second rests until exhaustion) were measured. During the five sessions, first the balance error scoring system (BESS) was administered on firm and foam surfaces and in three stances: double leg, single leg, and tandem; Borg Scale of Rate of Perceived Effort was administered and one of the exercises was performed. The tests were repeated after the exercises. Mixed, four-way analysis of variance was applied for data analysis. In the pretest, the total number of errors on the foam surface (9.27 ± 1.44) was more than the firm surface (5.05 ± 1.20) (P < 0.05). After the exercise and induction of fatigue, balance on the foam surface (13.97 ± 2.30) declined more than balance on the firm surface (8.29 ± 1.87) (P < 0.05). Balance declined more after anaerobic, mixed, and supramaximal intermittent exercises. Thus, athletic trainers and therapists must be aware of the effects of different exercises on balance when attempting to measure balance in diverse conditions. Keywords: balance decline, balance error scoring system, fatigue _____________________________________________________________________________________________ INTRODUCTION Balance control is necessary for performing daily activities and sport skills. Sport physicians and therapists use balance measurements in evaluating and rehabilitating various postural stability problems associated with orthopedic situations or mild head injuries (MHI) [1 & 2]. Considering the intimate link between balance and performance, stability and injury in lower extremities [3-7], athletic performance [8-10], and its pathological importance in evaluating head injury during sports activities [11 & 12], the intervening variables and evaluation methods of balance have been well developed. Various methods have been introduced for measuring balance, such as Romberg Test [1 & 2], Chattecx Balance System [12, 14-18], Biodex Stability System [19], and recently Balance Error