<a href="#myModal_addexercise" onclick="addexercise('{{ $workout->name }}', '{{ $workout->workout_id }}'); return false;" role="button" data-toggle="modal" class="btn btn-success">
    Add Exercises
</a>

<script>
function addexercise(name, workout_id) {
    alert(name);
    $('#modal-workout-name').html(name);
}
</script>