What preventative measures should be taken to avoid re-injuring a hip flexor - soccer injury? any specific stretches or weight training?

Avoid re-injury: In my experience groin strains( hip flexor/adductor muscle strains) are common in american football kickers and soccer players."rice"( rest, ice, compression , elevation / nsaids ) is most effective for treatment initially . The best advice i can give to avoid re-injury is to be certain your injury has completely healed before playing again. Stretching exersises once healed ? Benefit...