: Treat thumb posture with the same importance as back posture. Keeping the thumb in good alignment during tasks minimizes the stress on the basal joint.
As you reach 40, the cartilage that cushions the bones in your thumb's basal joint can begin to wear away. This can cause the metacarpal bone to slip slightly out of its joint with the wrist, sometimes visible on an X-ray before you even feel pain. Proper Thumb Maintenance & Care mature thumbs 40
To minimize wear and tear and preserve function, follow these "proper guide" strategies: : Treat thumb posture with the same importance
Beyond physical health, age 40 is a critical benchmark for general "rules of thumb" in life planning: This can cause the metacarpal bone to slip
: Aim for 150 minutes of moderate exercise weekly. For a 40-year-old, your target heart rate for moderate intensity should be between 90 and 126 bpm . Our Aging Thumbs - Occupational Therapy Services - WashU
: A common financial rule of thumb is to have 3x your annual income saved by age 40 to stay on track for a traditional retirement.