Combing strength training with sport-specific skill training sounds like a good idea - but it’s a disaster when it comes to golf! Many golfers, for example, swing a weighted golf club as a way of “learning” to swing faster. But according to motor learning theory there is only one motor pathway for any given movement (i.e., swinging a golf club). Swinging a weighted golf club develops the motor pathway (skill) required to perform that activity — so in effect, such an exercise actually trains you how to swing the club slower.
This training response is called negative transfer. Negative transfer leaves you less skilled at the activity (i.e., swinging a regular golf club) you are trying to get better at. To eliminate the chances of negative transfer, your strength training should be very different from your skill training. This type of training leads to indifferent transfer which means your strength training does not interfere with your ability to swing a golf club. To be the best golfer you can be, keep these activities separate: build strength in the gym and skill on the golf course.