667 Slideboard exercise has recently been recognized as an effective mode of cardiorespiratory training in the health-fitness setting. However, there is no standard protocol to assess VO2peak for slideboard exercise. The purposes of this investigation were threefold: 1). to develop a VO2 peak test protocol for slideboard exercise 2). to validate this test protocol by comparing cardiovascular, metabolic and rating of perceived exertion (RPE-Overall) responses between treadmill, cycle and slideboard protocols, and 3), to determine test-retest reliability of the peak slideboard protocol. Twenty healthy subjects (10 males and 10 females) with a mean age of 21.9 ± 1.9 yrs and a treadmill VO2max of 47.46 ± 7.76 ml·kg·min−1 participated in this study. Prior to slideboard testing two, twenty-minute slideboard orientations were performed. In a randomized order, subjects then completed an Astrand treadmill VO2max test, a modified Sjostrand cycle VO2peak test and two slideboard VO2peak tests. The slideboard protocol (length (ft). cadence (slides·min−1)) was: Stage I: 5.5, 23; II: 5.5, 25; III: 5.5, 28; IV: 6.0, 28; V: 6.0, 30; VI: 6.0, 31.5; VII: 6.5, 30. Each stage was two minutes in length. Subjects were required to strike alternate foot bumpers with each click of a metronome. Peak/maximal values for slideboard, treadmill and cycle exercise along with a summary of the repeated measures ANOVA for these data are listed in Table 1Table 1: Comparison of Peak/Maximal Values Across Test Protocols Fifteen of twenty subjects met the leveling off criterion for attainment of VO2peak. Sub-maximal HR and RPE-Overall increased as a positive function of increasing VO2 for the slideboard protocol. Test-retest reliability coefficients calculated for peak responses between slideboard test 1 and test 2 were VO2 (r=.70) and HR (r=.89). (p <0.01). Using apriori validation criteria for the attainment of peak oxygen uptake, the data indicated that the slideboard peak protocol compared favorably with other standardized multi-stage test protocols.