Clinical trial NCT06718699: Accuracy of Prediction Equations to Calculate Maximum Strength
Official title: Accuracy of a New Prediction Equation to Calculate One Repetition Maximum (1RM) in Trained and Untrained Young and Old Adults
Study type: OBSERVATIONAL
Overall status: ENROLLING_BY_INVITATION
Conditions: Healthy Aging
Keywords: maximum strength
one repetition maximum
repetitions to fatigue
prediction equation
resistance exercise
Lead sponsor: University of Erlangen-Nürnberg Medical School
Sponsor class: OTHER
First posted: 2024-12-05
Enrollment: 120
Sex: ALL
Minimum age (years): 18
Maximum age (years): 85
Standard ages: ADULT
OLDER_ADULT
Observational model: COHORT
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: The study population consists of resistance trained and untrained women and men 18 to 35 or 60-85 years old that are able to complete 1RM and RTF tests without endangering their health

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.


Eligibility criteria: 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

Primary outcomes:
measure: Maximum load, one repetition maximum, leg press
timeFrame: At baseline - no follow up tests
Secondary outcomes:
measure: Maximum load lifted at 5-8RM, leg press
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 9-12RM, leg press
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 13-16 RM, leg press
timeFrame: At baseline - no follow up tests
measure: Maximum load, one repetition maximum, lat pulls
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 5-8 RM, lat pulls
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 9-12 RM, lat pulls
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 13-16 RM, lat pulls
timeFrame: At baseline - no follow up tests
measure: Maximum load, one repetition maximum, triceps dips
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 5-8 RM, triceps dips
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 9-12 RM, triceps dips
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 13-16 RM, triceps dips
timeFrame: At baseline - no follow up tests
measure: Maximum load, one repetition maximum, trunk extension
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 5-8 RM, trunk extension
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 9-12 RM, trunk extension
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 13-16 RM, trunk extension
timeFrame: At baseline - no follow up tests
measure: Maximum load, one repetition maximum, trunk flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 5-8 RM, trunk flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 9-12 RM, trunk flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 13-16 RM, trunk flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load, one repetition maximum, leg flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 5-8 RM, leg flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 9-12 RM, leg flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 13-16 RM, leg flexion
timeFrame: At baseline - no follow up tests
measure: Maximum load, one repetition maximum, leg extension
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 5-8 RM, leg extension
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 9-12 RM, leg extension
timeFrame: At baseline - no follow up tests
measure: Maximum load lifted at 13-16 RM, leg extension
timeFrame: At baseline - no follow up tests
Other outcomes:
Locations:
city: Erlangen
country: Germany
facility: Institute of Radiology, University Hospital NErlangen
Study officials:
References: