Accuracy of Prediction Equations to Calculate Maximum Strength

• Conditions: Healthy Aging

• Registration Number: NCT06718699
• Lead Sponsor: University of Erlangen-Nürnberg Medical School

Brief Summary

Resistance exercise training (RT) is a key component of health related exercise programs. However, an accurate specification of RT load prescription is essential for effective and safe achievement of training aims. Proper specification of exercise intensity might be the most critical issue when designing RT protocols for adults. One repetition maximum tests (1RM) have been considered the "gold standard" of dynamic maximum strength evaluation. Although the argument of increased risk of injuries and adverse effects with 1RM testing in older people has been rejected by several studies , limited motivation to lift maximum loads, requirement for high test effort, time constraints, and interruption of the continuity of the training process aggravate the frequent application of 1RM tests particularly in non-athletic RT. 1RM prediction equations that use the load and number of repetitions completed to fatigue (RTF) to predict repetition maximum might be a reliable and feasible option to 1RM testing. Thus, the primary aims of this study were to evaluate the predictive accuracy of current RTF equations and to develop an equation that more accurately predicts 1RM from RTF tests.

Detailed Description

Not available

Study Timeline

• Status Verified: 2024-12
• Study First Submitted: 2024-12-01
• Study Start: 2024-12-02
• Study First Submitted QC: 2024-12-04
• Study First Posted: 2024-12-05
• Last Update Submitted: 2025-02-02
• Last Update Posted: 2025-02-05
• Primary Completion: 2025-03-31
• Study Completion: 2025-05-31

Recruitment & Eligibility

• Status: ENROLLING_BY_INVITATION
• Sex: All
• Target Recruitment: 120

Inclusion Criteria

• 18 to 35 years old
• 60 to 85 years old

Exclusion Criteria

• Contraindication for one repetition maximum tests
• musculoskeletal injuries that may prevent a reliable and safe assessment of the 1RM and RTF tests

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Maximum load, one repetition maximum, leg press	At baseline - no follow up tests	Maximum load lifted once (1RM, in kg) for the leg press exercise

Secondary Outcome Measures

Name	Time	Method
Maximum load lifted at 5-8 RM, triceps dips	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT5-8, in kg) for the triceps dips exercise
Maximum load lifted at 9-12 RM, triceps dips	At baseline - no follow up tests	Maximum load lifted 9-12 times (RFT9-12, in kg) for the triceps dips exercise
Maximum load lifted at 5-8RM, leg press	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT5-8, in kg) for the leg press exercise
Maximum load lifted at 9-12RM, leg press	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT9-12, in kg) for the leg press exercise
Maximum load lifted at 13-16 RM, leg press	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT13-16, in kg) for the leg press exercise
Maximum load, one repetition maximum, lat pulls	At baseline - no follow up tests	Maximum load lifted once (1RM, in kg) for the latissimus pull exercise
Maximum load lifted at 5-8 RM, lat pulls	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT5-8, in kg) for the latissimus pull exercise
Maximum load lifted at 9-12 RM, lat pulls	At baseline - no follow up tests	Maximum load lifted 9-12 times (RFT9-12, in kg) for the latissimus pull exercise
Maximum load lifted at 13-16 RM, lat pulls	At baseline - no follow up tests	Maximum load lifted 13-16 times (RFT13-16, in kg) for the latissimus pull exercise
Maximum load, one repetition maximum, triceps dips	At baseline - no follow up tests	Maximum load lifted once (1RM, in kg) for the triceps dips exercise
Maximum load lifted at 13-16 RM, triceps dips	At baseline - no follow up tests	Maximum load lifted 13-16 times (RFT13-16, in kg) for the triceps dips exercise
Maximum load, one repetition maximum, trunk extension	At baseline - no follow up tests	Maximum load lifted once (1RM, in kg) for the trunk extension exercise
Maximum load lifted at 5-8 RM, trunk extension	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT5-8, in kg) for the trunk extension exercise
Maximum load lifted at 9-12 RM, trunk extension	At baseline - no follow up tests	Maximum load lifted 9-12 times (RFT9-12, in kg) for the trunk extension exercise
Maximum load lifted at 13-16 RM, trunk extension	At baseline - no follow up tests	Maximum load lifted 13-16 times (RFT13-16, in kg) for the trunk extension exercise
Maximum load, one repetition maximum, trunk flexion	At baseline - no follow up tests	Maximum load lifted once (1RM, in kg) for the trunk flexion exercise
Maximum load lifted at 5-8 RM, trunk flexion	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT5-8, in kg) for the trunk flexion exercise
Maximum load lifted at 9-12 RM, trunk flexion	At baseline - no follow up tests	Maximum load lifted 9-12 times (RFT9-12, in kg) for the trunk flexion exercise
Maximum load lifted at 13-16 RM, trunk flexion	At baseline - no follow up tests	Maximum load lifted 13-16 times (RFT13-16, in kg) for the trunk flexion exercise
Maximum load, one repetition maximum, leg flexion	At baseline - no follow up tests	Maximum load lifted once (1RM, in kg) for the leg flexion exercise
Maximum load lifted at 5-8 RM, leg flexion	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT5-8, in kg) for the leg flexion exercise
Maximum load lifted at 9-12 RM, leg flexion	At baseline - no follow up tests	Maximum load lifted 9-12 times (RFT9-12, in kg) for the leg flexion exercise
Maximum load lifted at 13-16 RM, leg flexion	At baseline - no follow up tests	Maximum load lifted 13-16 times (RFT13-16, in kg) for the leg flexion exercise
Maximum load, one repetition maximum, leg extension	At baseline - no follow up tests	Maximum load lifted once (1RM, in kg) for the leg extension exercise
Maximum load lifted at 5-8 RM, leg extension	At baseline - no follow up tests	Maximum load lifted 5-8 times (RFT5-8, in kg) for the leg extension exercise
Maximum load lifted at 9-12 RM, leg extension	At baseline - no follow up tests	Maximum load lifted 9-12 times (RFT9-12, in kg) for the leg extension exercise
Maximum load lifted at 13-16 RM, leg extension	At baseline - no follow up tests	Maximum load lifted 13-16 times (RFT13-16, in kg) for the leg extension exercise

Trial Locations

Locations (1)

Institute of Radiology, University Hospital NErlangen; 🇩🇪 Erlangen, Germany