Some heartworm medications require a monthly administration, while others work even longer (up to six months with an injectible product called moxidectin). There are many choices of heartworm preventive medications available, from topical products to chewable oral medications; most come in both dog and cat versions. Monthly heartworm preventive medications do not actually stay in your dogâs bloodstream for 30 days. The active ingredients work to kill any larvae that have been in the system for the past 30 days, clearing the body each month.
This is sub-optimal. The glutes are slow twitch dominant by a few percent, but the hamstrings are composed of a whopping 70% fast twitch fibers. The erector spinae are slow twitch dominant by around 6%. This means you should use low reps for the hamstrings, but medium to high reps for the lower back and the glutes.
Research also shows that the erector spinae have a mix of type 2âhigh-threshold, fast-twitchâmuscle fibers and type 1âlow-threshold, slow-twitchâmuscle fibers. So maximum development of them requires a variety of training protocols.