Crossfit in Special Population

NCT ID: NCT07199114

Last Updated: 2025-09-30

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 60 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-02-01
• Study Completion Date: 2025-07-01

Brief 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

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: SINGLE

Study Groups

Adapted CrossFit Program

Supervised, scaled functional multi-joint training tailored to older adults, combining strength and metabolic conditioning with progressive overload over 12 weeks.

Group Type: EXPERIMENTAL

Adapted CrossFit Program (12 weeks)

Intervention Type: BEHAVIORAL

Supervised sessions focused on functional, multi-joint movements adapted for older adults; emphasis on safety and progressive overload.

Usual Activity (Control)

Participants maintain habitual daily activities with no structured training.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

Adapted CrossFit Program (12 weeks)

Supervised sessions focused on functional, multi-joint movements adapted for older adults; emphasis on safety and progressive overload.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

Community-dwelling older adults able to walk independently without assistance.

Cognitive function preserved, defined as a score of 26 points or higher on the Mini-Mental State Examination.

Absence of severe health conditions that would interfere with participation in exercise training.

Exclusion Criteria

Presence of active neuromuscular or musculoskeletal disorders that prevent safe exercise participation.

Severe cardiovascular, pulmonary, or metabolic disease that contraindicates moderate-intensity exercise.

Any other medical or psychological condition that, in the opinion of the investigators, would make participation unsafe or unreliable.

• Minimum Eligible Age: 65 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Jaén

OTHER

Sponsor Role: lead

Responsible Party

DAVID CRUZ DÍAZ

Principal investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

University of Jaén

Jaén, JAEN, Spain

Countries

Spain

Other Identifiers

CrossfitUJA

Identifier Type: -

Identifier Source: org_study_id