>>76644780 (OP)
you can build strength via progressive overload on squats n deads way faster than the strength you'd build doing those activities
solution; powerlifting block for 6 months (starting strength type novice linear progression) then diet and focus on the athletic pursuit of your choice (sprinting, biking, rugby whatever) lift 1-2x a week to maintain strength and enjoy the benefits of having strong as fuck legs (like jumping 2x higher/farther than you would otherwise)