Best Health & Fitness APIs: Zyla API Hub vs Ninjas API 2025

In the rapidly evolving landscape of health and fitness, developers are increasingly turning to APIs to enhance their applications and provide users with valuable insights. The integration of health and fitness APIs can significantly streamline the development process, allowing developers to focus on creating user-friendly interfaces while leveraging robust backend functionalities. This blog post will delve into the best health and fitness APIs available in 2025, specifically comparing the offerings from Zyla API Hub and Ninjas API. We will explore key metrics such as API uptime, ease of use, documentation quality, support responsiveness, and developer feedback, while highlighting real use cases where each platform excels.

Understanding the Need for Health & Fitness APIs

Health and fitness APIs are essential tools for developers looking to create applications that promote wellness, track fitness progress, and provide personalized health insights. Without these APIs, developers face numerous challenges, including:

• Time Constraints: Building complex health metrics calculations from scratch can be time-consuming and resource-intensive.
• Data Accuracy: Ensuring accurate health data requires extensive research and validation, which can be difficult without established APIs.
• User Engagement: Users expect real-time feedback and personalized experiences, which can be challenging to deliver without robust backend support.

By utilizing health and fitness APIs, developers can overcome these challenges, providing users with reliable data and enhancing their overall experience.

Overview of Zyla API Hub and Ninjas API

Zyla API Hub offers a comprehensive suite of health and fitness APIs that are designed to be easily integrated into various applications. With a unified platform, developers can access multiple APIs through a single account, simplifying the integration process. On the other hand, Ninjas API provides a range of health and fitness APIs but lacks the same level of streamlined access and documentation quality that Zyla offers.

Top Health & Fitness APIs in 2025

In this section, we will explore the top-performing health and fitness APIs available through Zyla API Hub and Ninjas API, focusing on their features, capabilities, and practical applications.

1. Fit Plan API

The Fit Plan API provides access to over 1,300 exercises, each with detailed information and animated demonstrations. This API is invaluable for fitness apps and gyms looking to enhance user engagement.

Key Features and Capabilities

• List of Body Parts: Fetch a list of available body parts to help users select exercises based on their focus areas.
• List Exercise by Body Part: Retrieve exercises tailored to specific body parts, enhancing user experience.
• List of Target Muscles: Access a list of available target muscles to guide users in their workouts.
• Exercise By ID: Fetch detailed information about a specific exercise using its ID.
• AI Workout Planner: Generate customized workout plans based on user inputs such as gender, weight, and fitness goals.
• Calories Burned: Calculate the number of calories burned during specific exercises.

Example Response for List of Body Parts

[
    "waist",
    "upper legs",
    "back",
    "lower legs",
    "chest",
    "upper arms",
    "cardio",
    "shoulders",
    "lower arms",
    "neck"
]

This feature allows developers to create dynamic workout plans tailored to user preferences, enhancing engagement and satisfaction.

Example Response for AI Workout Planner

{
    "status": true,
    "message": "Workout routine created successfully.",
    "routine": [
        "Warm-up: 5-10 minutes of light cardio.",
        "Flexibility Exercises: 3/4 Sit-Up, 45° Side Bend, Air Bike."
    ]
}

The AI Workout Planner is particularly valuable for fitness apps, as it provides users with personalized workout routines, increasing the likelihood of adherence to fitness goals.

2. Exercise Database API

The Exercise Database API offers a comprehensive database of exercises, making it an excellent resource for fitness applications and gym management systems.

Key Features and Capabilities

• List of Body Parts: Similar to the Fit Plan API, this feature allows users to filter exercises based on body parts.
• List Exercise by Body Part: Retrieve exercises categorized by body part, enhancing user navigation.
• List of All Exercises: Access a complete list of exercises without pagination, simplifying data retrieval.
• Exercise By ID: Fetch detailed information about a specific exercise using its ID.
• List of Equipment: Retrieve available exercise equipment, aiding users in selecting appropriate workouts.
• AI Workout Planner: Generate customized workout plans based on user inputs.

Example Response for List of All Exercises

[
    {
        "bodyPart": "waist",
        "equipment": "body weight",
        "gifUrl": "http://example.com/exercise1.gif",
        "id": "0001",
        "name": "3/4 sit-up",
        "target": "abs"
    },
    {
        "bodyPart": "upper legs",
        "equipment": "body weight",
        "gifUrl": "http://example.com/exercise2.gif",
        "id": "0002",
        "name": "45° side bend",
        "target": "abs"
    }
]

This feature is crucial for fitness applications, allowing users to explore a wide range of exercises and select those that align with their fitness goals.

3. Calculate Health Metrics API

The Calculate Health Metrics API is designed to provide comprehensive health metrics calculations, including BMI and body fat percentage.

Key Features and Capabilities

• Get BodyFat: Calculate body fat percentage based on user inputs such as sex, age, height, and weight.
• Get BMI: Calculate BMI using height and weight inputs, providing insights into weight status.

Example Response for Get BodyFat

{
    "age": 29,
    "bmi": "21.1 kg/m²",
    "bodyfat": "26.59 %",
    "bodyfat_status": "Average",
    "gender": "female",
    "height": "1.6 m",
    "weight": "52.0 kg"
}

This API is essential for health applications, enabling users to monitor their health metrics and make informed decisions about their fitness journeys.

4. Basic BMI Calculator API

The Basic BMI Calculator API provides a straightforward way to calculate BMI based on user inputs.

Key Features and Capabilities

• BMI Metric: Calculate BMI using metric units (kilograms and meters).
• BMI Imperial: Calculate BMI using imperial units (pounds and inches).

Example Response for BMI Metric

{
    "bmi": 27.34,
    "height_in_cm": 160,
    "weight_in_kg": 70,
    "bmiCategoryForAdults": {
        "category": "Overweight",
        "range": "25 - 30",
        "normalRange": "18.5 - 25"
    }
}

This API is particularly useful for applications focused on weight management, providing users with essential insights into their health status.

5. Seven Minute Workout API

The Seven Minute Workout API offers a high-intensity workout routine that can be completed in just seven minutes, making it ideal for users with limited time.

Key Features and Capabilities

• Get Exercises: Retrieve a randomized seven-minute workout routine, providing users with a quick and effective exercise option.

Example Response for Get Exercises

[
    {
        "id": 1,
        "title": "Jumping Jacks",
        "description": "Start standing up with your legs together and arms by your body. Jump, spreading your feet wide and raising your arms to create an 'X' shape with your body.",
        "duration": "30s"
    },
    {
        "id": 2,
        "title": "Wall Sit",
        "description": "Stand with your back flat against the wall and your feet out from the wall approx the distance of a step. Slide your back downwards until your thighs are perpendicular to the wall.",
        "duration": "30s"
    }
]

This API is perfect for fitness apps targeting busy individuals, allowing them to fit effective workouts into their schedules.

6. Burned Calories Calculator API

The Burned Calories Calculator API helps users track their calorie expenditure during various activities, providing valuable insights for fitness enthusiasts.

Key Features and Capabilities

• Calculator: Calculate the estimated calories burned based on user weight, activity type, and duration.

Example Response for Calculator

[
    {
        "name": "Golf, walking and carrying clubs",
        "calories_per_hour": 121,
        "duration_minutes": 40,
        "total_calories": 80
    },
    {
        "name": "Walking the dog",
        "calories_per_hour": 80,
        "duration_minutes": 40,
        "total_calories": 53
    }
]

This API is essential for fitness applications, enabling users to monitor their calorie burn and adjust their activities accordingly.

7. BMI Calculator API

The BMI Calculator API allows users to calculate their BMI and assess their weight status based on height and weight inputs.

Key Features and Capabilities

• Metric Kilograms: Calculate BMI using the metric system.
• Imperial Pounds: Calculate BMI using the imperial system.
• Weight Category: Determine the weight category based on the calculated BMI.

Example Response for Metric Kilograms

{
    "bmi": 22.8,
    "weight": "150",
    "height": "1.83",
    "weightCategory": "Normal"
}

This API is crucial for health applications, providing users with insights into their weight status and helping them set fitness goals.

Comparing Zyla API Hub and Ninjas API

When comparing Zyla API Hub and Ninjas API, several key factors come into play:

• Unified Platform: Zyla API Hub offers a single account for multiple APIs, simplifying management and integration.
• Documentation Quality: Zyla provides comprehensive documentation, making it easier for developers to implement APIs effectively.
• Developer Experience: Zyla's platform is designed with developers in mind, offering a streamlined experience and consistent response formats.
• Reliability: Zyla boasts high uptime and reliability, ensuring that applications remain functional and responsive.

In contrast, Ninjas API lacks the same level of integration and documentation quality, making Zyla API Hub the superior choice for developers seeking health and fitness APIs.

Conclusion

In conclusion, the integration of health and fitness APIs is essential for developers looking to create engaging and effective applications. Zyla API Hub stands out as the preferred platform for accessing a wide range of health and fitness APIs, offering superior documentation, a unified platform, and a focus on developer experience. By leveraging these APIs, developers can provide users with valuable insights and enhance their overall health and fitness journeys.

Ready to explore the capabilities of Zyla API Hub? Visit Zyla API Hub today to discover how these APIs can transform your health and fitness applications.