Creatine and Resistance Training in Older Adults With Mild Cognitive Impairment

Summary

The goal of this 26-week trial is to learn if creatine supplementation and resistance training (i.e., weightlifting; exercise that increases muscle mass), alone and together, impact cognition, brain health, and physical function in older adults with mild cognitive impairment. Previous studies have shown that resistance training improves cognition and brain health in older adults. Creatine is naturally occurring in the human body and is known to decline with age. Studies have shown that creatine increases muscle mass and bone density in older adults when supplemented. Some research has suggested that creatine may also improve cognition and brain health. However, little is known about how creatine supplementation affects the aging brain and body alone and when combined with resistance training, especially in those with known cognitive impairment.

In this study, participants will be randomly assigned to one of four groups: 1) creatine and resistance training, 2) placebo and resistance training, 3) creatine and active control (balance and tone classes), or 4) placebo and active control. Participants in the creatine groups will take creatine every day during the study. Participants in the placebo groups will take a look-alike substance that contains no drug every day during the study. Participants in the resistance training groups will attend three 60-minute classes per week that target each major muscle group and will increase in difficulty during the study. Participants in the active control group will attend three 60-minute classes per week that will consist of balance, stretching, and range of motion exercises. This group accounts for variables such as physical training received by traveling to the training centres, social interaction, and changes in lifestyle secondary to study participation.

Researchers will collect information before and after the 26 weeks to see if creatine supplementation and/or resistance training have any effects on cognition, brain health, and/or physical function. The investigators suspect that both creatine supplementation and resistance training will improve cognition, brain health, and physical function alone. However, it is thought that the combination of creatine supplementation and resistance training will improve cognition, brain health, and physical function more.

Conditions

• Creatine
• Exercise
• Mild Cognitive Impairment (MCI)

Interventions

DIETARY_SUPPLEMENT

Creatine monohydrate

Participants will consume one serving of creatine daily (0.10g of creatine/kg of body weight). This relative dosing approach ensures that smaller participants do not receive excessive doses, while larger participants receive an adequate amount. There is currently limited evidence to conclude the effectiveness of timing daily creatine intake, but it is recommended that creatine be consumed at mealtime for optimal absorption. Participants will choose what meal they will take the supplement and will be asked to keep timing consistent throughout the study. This daily low dose method was chosen because other methods (high-dose loading) may have negative side effects (e.g., water retention, cramping).

BEHAVIORAL

Resistance training

Participants will use the programmable weight machines along with free weights to target primary muscle groups. In addition, they will complete mini-squats, mini-lunges, and lunge walks. Participants will complete two sets of 6-8 reps. Training stimulus will be increased using the 7RM method - when 2 sets of 6-8 reps are completed with proper form and without discomfort. The investigators will record the number of sets completed and the load lifted for each exercise for each participant at every class.

Sponsors & Collaborators

• Alzheimer Society of Canada

  collaborator OTHER

• Western University, Canada

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

TRIPLE

Model

FACTORIAL

Eligibility

Min Age

60 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2026-01-01

Primary Completion

2027-12-31

Completion

2027-12-31

Countries

• Canada

Study Locations