NCT07199114

Crossfit in Special Population

Strength Training and Modified CrossFit in Older Adults: a Comparative Perspective

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 60 (actual)
• Sponsor: University of Jaén · Academic / Other
• Sex: All
• Age: 65 Years – 80 Years
• Healthy volunteers: Accepted

Summary

This randomized, parallel-group clinical trial evaluates a 12-week adapted CrossFit program versus usual activity in community-dwelling older adults. The primary endpoint is change in Timed Up and Go (TUG) from baseline to 12 weeks. Secondary outcomes include Functional Reach (FRT), Romberg (eyes closed), gait velocity, stride length, and lower-limb power tests (Chair-Stand, Stair Ascent, Stair Descent; time and W/kg). Sixty participants were randomized (1:1). Analyses used repeated-measures ANOVA with Bonferroni adjustments and Cohen's d effect sizes.

Detailed description

Participants were screened and randomized (1:1) to an adapted CrossFit program (12 weeks) or to maintain usual activities (no structured training). Baseline characterization included demographics, anthropometrics, Mini-Mental State Examination (MMSE ≥ 26), physical activity level, and handgrip strength. Balance outcomes: Romberg (s, eyes closed), gait velocity (m/s), stride length (cm), TUG (s), and FRT (cm). Lower-limb power: Chair-Stand (s; W/kg), Stair Ascent/Descent (s; W/kg). Statistical analysis: normality (Shapiro-Wilk), homogeneity (Levene), repeated-measures ANOVA with Bonferroni post-hoc, and Cohen's d effect sizes. A priori sample size (G\*Power 3.1): effect size 0.25, α = 0.05, power 0.80 → target n = 60 to account for attrition.

Conditions

• Postural Balance
• Strength Training Adaptations
• Aging

Interventions

Type	Name	Description
BEHAVIORAL	Adapted CrossFit Program (12 weeks)	Supervised sessions focused on functional, multi-joint movements adapted for older adults; emphasis on safety and progressive overload.

Timeline

• Start date: 2025-02-01
• Primary completion: 2025-06-30
• Completion: 2025-07-01
• First posted: 2025-09-30
• Last updated: 2025-09-30

Locations

1 site across 1 country: Spain