[
                {
                    "main": "All Muscle Groups",
                    "second": undefined
                },
            {
                "main": "Biceps",
                "second": "Biceps"

            }, {
                "main": "Back",
                "second": "Back"
            },
            {
                "main": "Chest",
                "second": "Chest"
            }, {
                "main": "Core",
                "second": "Core"

            }, {
                "main": "Hamstrings",
                "second": "Hamstrings"

            }, {
                "main": "Quadriceps",
                "second": "Quadriceps"
            }, {
                "main": "Shoulders",
                "second": "Shoulders"
            },

            {
                "main": "Triceps",
                "second": "Triceps"
            }
            ]