How to Count Side Lunges with AI

Building an AI-Powered Side Lunges Counter App with Pose Estimation Using QuickPose iOS SDK

Are you looking to create an AI-powered Side Lunges counter for your fitness app? Side Lunges are a dynamic lower-body exercise that primarily targets the gluteus medius, quadriceps, and adductors, while also engaging the hamstrings and calves. This exercise is particularly effective for improving lateral movement, enhancing hip stability, and building overall leg strength.

In this guide, you’ll learn how to develop a Side Lunges counter app using pose estimation with the QuickPose iOS SDK. Whether you’re building a new fitness app or adding advanced features to an existing one, this tutorial will help you harness the power of AI and pose estimation technology to deliver a precise and user-friendly Side Lunges counter that stands out in the competitive fitness market.

GIF shows side lunge exercise reps being counted by ai pose estimation

Steps to integrate an Side Lunges rep counter into your app:

Register an SDK Key with QuickPose

Get your free SDK key on https://dev.quickpose.ai, usage limits may apply. SDK Keys are linked to your bundle ID, please check Key before distributing to the App Store. 

This is a quick look to integrate the Side Lunges counter using the QuickPose iOS SDK. You can see the full documentation here: QuickPose iOS SDK Side Lunges installation.

Activate Side Lunges Feature

				
					feature = .fitness(.sideLunges)
feature = .fitness(.sideLunges, style: customOrConditionalStyle)
				
			

Form Feedback

We recommend using the feature feedback to guide the user if an error occurs.

				
					quickPose.start(features: [.fitness(.sideLunges)], onFrame: { status, image, features, feedback, landmarks in
    switch status {
        case .success:
            overlayImage = image
            if let result = features.values.first  {
                feedbackText = "Side Lunges: \(Int(result.value * 100))%"
            } else if let feedback = feedback.values.first, feedback.isRequired  {
                feedbackText = feedback.displayString
            } else {
                feedbackText = nil
            } 
        case .noPersonFound:
            feedbackText = "Stand in view";
        case .sdkValidationError:
            feedbackText = "Be back soon";
    }
})
				
			

Body position: "Stand facing camera"

				
					.body(feedback: standFacing, isRequired: true) 
				
			

Joint Visibility:

"Move left arm into view" "Move right arm into view" "Move upper body into view"
"Move left leg into view" "Move right leg into view" "Move lower body into view"
"Move whole body into view"

				
					.group(action: .move, group:.arm(side: .left), direction:.intoView, isRequired: true) 
.group(action: .move, group:.arm(side: .right), direction:.intoView, isRequired: true) 
.group(action: .move, group:.upperBody, direction:.intoView, isRequired: true) 
.group(action: .move, group:.leg(side: .left), direction:.intoView, isRequired: true)
.group(action: .move, group:.leg(side: .right), direction:.intoView, isRequired: true)
.group(action: .move, group:.lowerBody, direction:.intoView, isRequired: true)
.group(action: .move, group:.wholeBody, direction:.intoView, isRequired: true)
				
			

Conditional Styling

To give user feedback consider using conditional styling so that when the user’s measurement goes above a threshold, here 0.8, a green highlight is shown.

				
					let greenHighlightStyle = QuickPose.Style(conditionalColors: [QuickPose.Style.ConditionalColor(min: 0.8, max: nil, color: UIColor.green)])
quickPose.start(features: [.fitness(.sideLunges, style: customOrConditionalStyle)], 
                onFrame: { status, image, features, feedback, landmarks in  ...
})
				
			

How to Side Lunge Reps

Real-time Side Lunge counting with AI

To count the Side Lunge declare a configurable threshold counter, which can be used to turn lots of our features into counts.

				
					@State private var counter = QuickPoseThresholdCounter()
				
			

Then pass QuickPose’s Side Lunge result to the counter, and display in the feedback text declared above.

				
					quickPose.start(features: [.fitness(.sideLunges)], onFrame: { status, image, features, feedback, landmarks in
    switch status {
        case .success:
            overlayImage = image
            if let result = features.values.first  {
                let counterState = counter.count(result.value)
                feedbackText = "\(counterState.count) Side Lunges"
            } else {
                feedbackText = nil
            }
            
        case .noPersonFound:
            feedbackText = "Stand in view";
        case .sdkValidationError:
            feedbackText = "Be back soon";
    }
})
				
			

Side Lunges Timer

To time the Side Lunges declare a configurable threshold timer, which can be used to turn lots of our features into timers. For Side Lunges, we suggest modifying the default threshold, taking account of expected camera positioning and tilt.

				
					@State private var timer = QuickPoseThresholdTimer(threshold: 0.2)
				
			

Then pass the result’s raw value to the timer, and display in the feedback text declared above.

				
					quickPose.start(features: [.fitness(.sideLunges)], onFrame: { status, image, features, feedback, landmarks in
    switch status {
        case .success:
            overlayImage = image
            if let result = features.values.first  {
                let timerState = timer.time(result.value)
                feedbackText = String(format: "%.1f", timerState.time) + "secs"
            } else {
                feedbackText = nil
            }
            
        case .noPersonFound:
            feedbackText = "Stand in view";
        case .sdkValidationError:
            feedbackText = "Be back soon";
    }
})
				
			

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