That is hardly conclusive evidence that weightlifting improves one's chances of getting a girlfriend.
Intellect is at least as effective as brawn in attracting a quality woman.
Most critical, though, is self-confidence , one of those subtle changes that takes place inside as you develop and transform yourself as a person. A program of regular exercise and activity is none the less important for maintaining both physical and emotional health. By all means, run, walk, swim, hike, bicycle, lift weights, and even climb mountains. If you are fit and feeling fine, you will develop a better self-image, take pride in your appearance, and be more confident of your ability to cope with life's little surprises . Dealing with people, and with women in particular, will seem less formidable.