2007 Student Research Conference:
20th Annual Student Research Conference

Human Potential and Performance

Validity of Repetitions to Predict Maximal Bench Press and Squat in High School Boys and Girls
Lori E. Peters
Dr. Jerry Mayhew, Faculty Mentor

The purpose of this study was to determine the accuracy of selected prediction equations to estimate 1-RM bench press and squat in adolescent boys and girls. Boys (n = 57) and girls (n = 20) enrolled in weight training were measured for 1-RM and maximum repetitions to fatigue in each exercise. A recently published bench press prediction equation produced a high intraclass correlation coefficient (ICC = 0.99) and nonsignificantly underpredicted by 2.6 (±10.8) lbs. It predicted 70% of boys within ±10 lbs and 20% of girls within ±5 lbs of actual 1-RM. A recently published squat prediction equation produced a high intraclass correlation coefficient (ICC = 0.99) but significantly overpredicted by 20.5 (±18.3) lbs. It predicted 45% of boys within ±20 lbs and 14% of girls within ±10 lbs of actual 1-RM. Prediction from repetitions is better for bench press than squat and better in boys than in girls.

Keywords: predict, bench press, squat, 1 repetition maximum, high school, boys, girls, equation

Topic(s):Exercise Science

Presentation Type: Poster

Session: 2-19
Location: OP Lobby
Time: 4:15 pm

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