Offset Handle Leg Lift Dumbbell for Stability
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Solution Overview
Problem
Conventional dumbbells are not ideally suited for lower body workouts, as they tend to slip, roll, or fall during exercises like leg curls and lifts, posing safety risks and inefficiencies.
Innovation Solution
A leg lift dumbbell with an offset handle and elongated, flattened weights for stability, optionally ferromagnetic with adjustable weights, and an electronic monitoring system for customizable workouts, and an adjustable handle for optimal fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional dumbbell is used for leg exercises, then the dumbbell can provide resistance for upper body workouts, but it tends to slip, roll, or fall during lower body exercises like leg curls and lifts
Solution Approach 1:
The dumbbell handle is positioned asymmetrically, offset toward the top of the dumbbell rather than being coaxial with the centers of the weights. This asymmetric positioning prevents the dumbbell from rolling when positioned in the crook of the knee during leg exercises, while maintaining functionality for upper body workouts.
Solution Approach 2:
The weights are changed from traditional round shapes to elongated shapes that are flattened on the bottom. This dimensional change adds stability by creating a flat base that prevents rolling, while the elongated shape allows the dumbbell to be securely positioned in the popliteal fossa during leg exercises.
2Force
If a conventional dumbbell is used for kneeling leg lifts, then it can provide resistance, but it is awkward and inefficient requiring squeezing between hamstrings and calf muscles
Solution Approach 1:
The dumbbell is designed with specific local characteristics: the handle is offset toward the top and the weights are elongated and flattened on the bottom. These local quality changes enable the dumbbell to be easily positioned in the popliteal fossa (crook of the knee) without requiring awkward squeezing between muscles, making the exercise more efficient and comfortable.
3Force
If additional weights are added to increase exercise intensity, then resistance increases, but the dumbbell structure becomes more complex
Solution Approach 1:
The dumbbell incorporates ferromagnetic material, allowing additional weights to be magnetically attached and easily adjusted. This dynamic system enables users to change resistance levels by simply adding or removing magnetic weights without complex mechanical assemblies, maintaining simplicity while providing adjustable intensity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables secure and efficient leg lifts by preventing the dumbbell from rolling or slipping, allowing for adjustable resistance and providing real-time workout feedback, enhancing exercise safety and effectiveness.
Implementation Method 1
In a second embodiment of the invention, the dumbbell is ferromagnetic. Additional weights are then magnetically attached to the dumbbell, so that the exercise intensity is easily adjustable.
Implementation Method 2
An accelerometer in the dumbbell senses each leg lift.
Implementation Method 3
Additional weights are then magnetically attached to the dumbbell
Data Source
AI summary
The invention is a dumbbell adapted for lifting by the legs. In particular, it is designed to fit in the crook of the knee for exercises such as the kneeling dumbbell leg lift and the fire hydrant leg lift. The handle is offset from center, flush with the top of the weights to prevent the dumbbell from rolling down the calf. The weights are fixedly attached to the handle so they do not rotate. The weights have a horseshoe shape, elongated vertically so they do not slip off the leg, and flattened at the bottom for stability on the floor. The weights also taper inward at the base to hold the leg firmly. Options include an adjustable length handle, magnetic additional weights, a handle cushion, and an electronic user interface to adjust the number of reps and the rest period.