💪 Sarcopenia (Muscle Loss) Risk Calculator 🏋️

For aging men concerned about muscle decline and strength loss

Personal Information

Age (years)

Height

cm

Weight

kg

Physical Function

Gait Speed (4-meter walk test) ℹ️Time to walk 4 meters at usual pace (in seconds)

Chair Stand Test (5 rises) ℹ️Time to rise from chair 5 times without using arms (in seconds)

Self-Reported Difficulty With:

Climbing 10 stairs

Walking 400 meters

Lifting/carrying 5kg

Rising from chair

Strength Measurements

Grip Strength (kg) ℹ️Average of 3 measurements with dynamometer in dominant hand

Leg Strength (kg) ℹ️Maximum leg press or quadriceps strength

Health & Lifestyle Factors

Physical Activity Level Sedentary (little or no exercise) Light activity (1-2 days/week) Moderate activity (3-5 days/week) Active (6-7 days/week) Athlete (intense training daily)

Protein Intake (g/kg body weight/day) ℹ️Estimated daily protein intake per kg of body weight

Select any health conditions:

Diabetes

COPD or lung disease

Heart disease

Arthritis

Cancer (current or history)

Sarcopenia Risk Assessment

How to Use This Calculator

This calculator assesses your risk of sarcopenia (age-related muscle loss) based on established criteria including muscle mass, strength, and physical performance.

1. Enter your personal information - Age, height, and weight (units can be toggled).
2. Input physical function measures - Gait speed and chair stand test times if available.
3. Check any functional difficulties you experience with daily activities.
4. Enter strength measurements - Grip strength and leg strength if known.
5. Select your activity level and estimate protein intake.
6. Check any relevant health conditions that may affect muscle health.
7. Click "Calculate Risk" to get your assessment.

Example 1: High Risk

Patient: 72-year-old male

Height/Weight: 175cm, 68kg (BMI 22.2)

Physical Function: Gait speed 1.0 m/s, Chair stands 15 seconds

Strength: Grip 22kg, Leg press 60kg

Lifestyle: Sedentary, protein 0.7g/kg

Conditions: Diabetes, Arthritis

Result: High risk of sarcopenia - recommendation for resistance training and nutritional intervention

Example 2: Moderate Risk

Patient: 65-year-old male

Height/Weight: 180cm, 80kg (BMI 24.7)

Physical Function: Gait speed 1.2 m/s, Chair stands 12 seconds

Strength: Grip 28kg, Leg press 80kg

Lifestyle: Moderate activity, protein 1.0g/kg

Conditions: None

Result: Moderate risk - recommendation for increased protein and strength training

About Sarcopenia

Sarcopenia is the progressive loss of muscle mass, strength, and function associated with aging. It affects approximately 10% of adults over 60 and up to 50% of those over 80.

Diagnostic Criteria (EWGSOP2 Guidelines):

• Low muscle strength: Primary indicator (grip strength <27kg for men)
• Low muscle quantity/quality: DXA scan or other imaging
• Poor physical performance: Gait speed ≤0.8 m/s, chair stand test >15 seconds

Risk Factors:

• Age: Muscle mass declines ~3-8% per decade after 30
• Physical inactivity: Sedentary lifestyle accelerates loss
• Nutrition: Inadequate protein intake (especially leucine)
• Chronic diseases: Diabetes, heart disease, COPD, etc.
• Hormonal changes: Reduced testosterone, growth hormone
• Inflammation: Chronic low-grade inflammation

Consequences of Sarcopenia:

• Increased risk of falls and fractures
• Loss of independence and mobility
• Higher mortality risk
• Reduced quality of life
• Increased hospitalization rates

Prevention and Treatment:

• Resistance training: 2-3 times weekly, progressive overload
• Protein intake: 1.0-1.2g/kg/day (up to 1.5g/kg for severe cases)
• Vitamin D: Maintain adequate levels (>30 ng/mL)
• Manage chronic conditions: Optimize treatment of comorbidities
• Reduce sedentary time: Break up prolonged sitting

Note: This tool provides risk estimation based on available data but does not replace clinical assessment. Diagnosis of sarcopenia requires comprehensive evaluation by a healthcare professional.