Accuracy of Prediction Equations to Calculate Maximum Strength
Healthy Aging
What this study involves
The registry does not currently label this study as recruiting. Ask about its status before planning a screening visit.
- Study type
- Observational
- Phase
- Not applicable / not listed
- Age range
- 18 years - 85 years
- Sex eligible
- All sexes
- Healthy volunteers
- Not accepted
- Participants
- 120 Estimated
These are starting points, not an eligibility decision. The research team must review the full requirements.
About the research
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.
Who may be able to participate?
The list below is the sponsor’s full registry wording. It can include conditions, prior treatment, test results and other requirements. A match in search does not mean you qualify.
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 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
Understand screeningTreatment, groups and participation
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- Assignment
- Not reported
- Masking
- Not reported
resistance exercise tests OTHER
One 1RM and three RTF tests (5-8RM, 9-12RM, 13-16RM) on seven resistance training devices
What researchers are measuring
Outcome measures describe what is being studied. They are not proof that a treatment works.
Primary measures
Maximum load, one repetition maximum, leg press
Time frame: At baseline - no follow up tests
Maximum load lifted once (1RM, in kg) for the leg press exercise
Secondary measures
Maximum load lifted at 5-8RM, leg press
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: At baseline - no follow up tests
Maximum load lifted once (1RM, in kg) for the triceps dips exercise
Maximum load lifted at 5-8 RM, triceps dips
Time frame: 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
Time frame: 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 13-16 RM, triceps dips
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: 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
Time frame: At baseline - no follow up tests
Maximum load lifted 13-16 times (RFT13-16, in kg) for the leg extension exercise
Review the complete result tables and limitations in the official record.
Open official results ↗Research locations (1)
The overall study status and a local site’s status can differ. Confirm that location’s availability before traveling.
1 locations
Institute of Radiology, University Hospital NErlangenErlangen, GermanyStatus unknown
Study team and timeline
- Lead sponsor
- University of Erlangen-Nürnberg Medical School
- Study start
- Dec 2, 2024 Actual
- Primary completion
- Apr 30, 2027 Estimated
- Study completion
- May 31, 2027 Estimated
- First posted
- Dec 5, 2024 Actual
- Last updated
- Nov 10, 2026 Actual
Official study contacts
No central contact is listed. Check the locations and the official record.
Official study title
Accuracy of a New Prediction Equation to Calculate One Repetition Maximum (1RM) in Trained and Untrained Young and Old Adults
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Source: ClinicalTrials.gov API v2. Information is submitted by sponsors and investigators. NLM does not approve the safety or science of all listed studies. Registry disclaimer.
Retrieved: Nov 12, 2026 · Last registry update: Nov 10, 2026