CategoryStrength
Session20 - 75 min

Strength training uses functional movement patterns to build usable strength, stability, and muscular endurance. It often includes bodyweight work, free weights, kettlebells, resistance bands, or compound movements. Heart rate may rise during circuits, but the main training signal is still muscular force and movement quality.

Exercise Metrics

Fitness Profile [1]

Strength
8
Low-Intensity Cardio (aerobic)
3
High-Intensity Cardio (peak)
3
Mobility & Flexibility
4
Balance
5
Estimated impact of the activity on the 5 key fitness dimensions for longevity.
Based on Bryan Johnson's Blueprint Protocol.

Heart Rate Zones [2]

0
Rest
0 - 49 %
1
Very easy
50 - 59 %
2
Easy aerobic
60 - 69 %
3
Moderate aerobic
70 - 79 %
4
Hard
80 - 89 %
5
Very hard
90 - 100 %
Typical distribution as % of HR max.
Actual values depend on workout intensity, fitness level, duration, and individual physiology.

Activity Type Details

Apple Health label
Functional Strength Training
HealthKit reference [3]
.functionalStrengthTraining
MET [4]
3 - 6.5
Typical session duration
20 - 75 min
Recommended fitness level
Beginner
Injury risk
Medium

Calorie Burn

Estimated active Calories per 30 minutes of exercise for the MET range 3 - 6.5. Active Calories exclude the energy your body would use at rest.

Body weightEstimated active Calories
/ 30min
50 kg (110 lb)
53 - 144 Cal
60 kg (132 lb)
63 - 173 Cal
70 kg (154 lb)
74 - 202 Cal
80 kg (176 lb)
84 - 231 Cal
90 kg (198 lb)
95 - 260 Cal
100 kg (220 lb)
105 - 289 Cal

Actual energy use varies with intensity, fitness, movement efficiency, and individual physiology. Learn more in the "How to Estimate Calories Burned with MET Values" resource.

Training advice

Benefits

Functional strength training builds useful force through movement patterns like squatting, hinging, pushing, pulling, carrying, and rotating. It supports daily capacity and complements endurance training.

What to watch out for

Technique, load choice, and fatigue management matter more than novelty. Practice new movements light, keep joints stacked, and stop sets before form breaks under load.

Streakout app preview – Summary, Insights & Timeline
Visualize the Strength Training workout stats on your iPhone
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Explore other Activity Types in the Strength category:

[1]
Learn more about fitness longevity dimensions in the "5 Pillars of Exercise for Longevity" resource.
[2]
Learn more about Heart Rate Zones in the "Heart Rate Zones Explained" resource.
[3]
The HealthKit HKWorkoutActivityType value this Activity Type is associated with.
[4]
MET (Metabolic Equivalent of Task) expresses how much energy an activity requires compared with rest. It is commonly used together with body weight and exercise duration to estimate calorie burn.
Disclaimer
The content on this page is for general informational purposes only and not intended as medical advice. Provided metrics are for the most part estimates and might not be based on clinical evidence. The goal is to provide directional guidance and improve the models over time.