What is a macro calculator?

A macro calculator estimates how many grams of protein, carbohydrates, and fat you should eat each day based on your weight, height, age, sex, activity level, and goal. kkal.ai uses the Mifflin-St Jeor equation to calculate BMR, multiplies by an activity factor to get TDEE, then splits the calorie target into macro grams.

How accurate is the Mifflin-St Jeor equation?

The Mifflin-St Jeor equation is considered the most accurate predictive equation for resting metabolic rate in healthy adults. A 2005 Academy of Nutrition and Dietetics review found it predicted RMR within 10% of measured values in roughly 82% of non-obese adults.

Is kkal.ai free to use?

Yes. The kkal.ai macro calculator, BMR calculator, and AI meal photo analyzer are free to use on the web. No account is required to use the standalone calculators.

What macro split should I use for weight loss?

kkal.ai recommends 40% protein, 40% carbohydrates, and 20% fat for weight loss. Higher protein intake helps preserve lean muscle in a calorie deficit and increases satiety. For maintenance or muscle gain, a 30/45/25 split is the default.

How does kkal.ai analyze meal photos?

kkal.ai uses GPT-4 Vision to identify foods in an uploaded photo, then estimates calories, protein, carbohydrates, and fat per item based on visible portion sizes and standard nutrition data.

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fitness · 2024-01-10 · 5 min read · by kkal.ai Editorial

High-Intensity Interval Training (HIIT): Maximizing Your Workout Efficiency

Discover how HIIT can transform your fitness routine with shorter, more effective workouts that boost metabolism and improve cardiovascular health.

High-Intensity Interval Training (HIIT) has revolutionized the fitness world by proving that shorter, more intense workouts can be more effective than longer, moderate-intensity sessions.

What is HIIT?

HIIT involves alternating between short bursts of intense activity and periods of rest or low-intensity recovery. A typical HIIT session might include:

30 seconds of high-intensity exercise
30-60 seconds of rest or low-intensity movement
Repeat for 15-30 minutes total

Benefits of HIIT Training

Time efficiency: Get maximum results in minimal time
Increased metabolism: Burn calories for hours after your workout
Improved cardiovascular health: Strengthen your heart and lungs
Fat loss: Particularly effective for reducing abdominal fat
Muscle preservation: Maintain muscle mass while losing fat

Sample HIIT Workouts

Beginner HIIT:

Jumping jacks - 30 seconds
Rest - 30 seconds
Bodyweight squats - 30 seconds
Rest - 30 seconds
Repeat 5-8 rounds

Advanced HIIT:

Burpees - 45 seconds
Rest - 15 seconds
Mountain climbers - 45 seconds
Rest - 15 seconds
Repeat 8-12 rounds