Dr. Andy Galpin Reveals How Much Exercise is Best for Fat Loss (and how much is too much)

Dr. Galpin suggests that for people with high allostatic load, adding a 10-minute down-regulation practice post-workout can be more effective than reducing exercise volume. This practice helps shift the body from a sympathetic (fight-or-flight) state to a parasympathetic (rest-and-digest) state, allowing recovery and reducing cumulative stress. He notes that this can be as simple as breath work or a relaxation technique, and it can prevent the negative effects of excessive stress without sacrificing training intensity.

Dr. Galpin emphasizes that for individuals with high stress, simple walks without earbuds can be a powerful tool to lower allostatic load. He suggests three 10-minute walks a day with no podcasts, no business calls, nothing. This practice helps break the cycle of constant stimulation and allows the nervous system to down-regulate. He notes that it's not about doing less exercise but about adding restorative moments that counterbalance the stress of training and life.

Dr. Galpin explains that for people with high baseline stress, doing maximal interval sessions every day can lead to 'fry city.' He suggests pulling back to four days a week and adding restorative activities. This reduction in training stress, combined with down-regulation practices, can lower allostatic load and unlock progress. He cautions against stopping exercise entirely, as that can lead to rumination and worse outcomes.

Dr. Galpin gives the example of an executive who spends 7-8 PM on emails. He suggests replacing that hour with learning a language or playing guitar. This isn't about doing nothing; it's about doing something that fills the bucket rather than draining it. The key is that the activity should be restorative and not add to the stress load. This approach helps balance the allostatic load without requiring a complete lifestyle overhaul.

Dr. Galpin mentions that in some cases, simply reducing stimulant intake can help lower allostatic load. He clarifies that he's not against stimulants, but when someone's stress bucket is full, stimulants can be the straw that breaks the camel's back. By cutting back, the body can better handle the remaining stressors.

Dr. Galpin begins by addressing the common concern that too much exercise can impede fat loss by elevating cortisol. He dismisses the cortisol argument as negligible, stating that the real issue is not overtraining per se but the accumulation of allostatic load. He explains that true overtraining is incredibly rare, especially in strength training, having been induced only once in a study where participants performed 10 one-rep max back squats daily for 14 days, taking 2-8 weeks to recover. This extreme protocol is far beyond typical training volumes. Instead, when people hit plateaus or feel overtrained, it's usually because their 'stress bucket' is already full of hidden stressors—psychological stress, nutritional deficiencies, hormonal imbalances, gut issues, etc. Adding exercise, a visible stressor, causes the bucket to overflow, leading to symptoms like sleep issues, performance dips, and stalled progress. The solution is not to stop exercising but to identify and reduce hidden stressors and add restorative practices to lower allostatic load. He emphasizes that this approach can lead to rapid improvements, as he has observed in himself and clients.

Dr. Galpin references a study from his master's lab (Andy Fry's lab) that successfully induced overtraining in strength training. Participants performed 10 one-rep max back squats every day for 14 days. This protocol led to significant performance decrements, and it took participants between 2 to 8 weeks to return to baseline. He notes that this is the only time overtraining has been shown in strength training, highlighting how difficult it is to achieve. In contrast, endurance athletes may experience overtraining more commonly, but it's still rare. This study underscores that most recreational exercisers are nowhere near overtraining, and their plateaus are likely due to other factors like allostatic load.

Dr. Galpin explains that hidden stressors are non-specific factors that add to the body's total stress load. These can include micronutrient deficiencies, bacterial overgrowth, parasites, hormonal imbalances, and psychological stress from high-pressure jobs or personal life. Because these stressors are not visible like exercise, people often don't realize they are contributing to their allostatic load. When they then add exercise, the cumulative stress exceeds the body's capacity, leading to plateaus, sleep issues, and performance declines. He notes that in his coaching program, many clients have hidden stressors that, once addressed, allow them to make rapid progress without necessarily changing their exercise routine.

Dr. Galpin shares that when he or his clients reduce total stress load—whether by cutting training volume, adding walks, or addressing hidden stressors—they often see massive jumps in progress. He gives the example of high-stress professionals who, by simply adding 10-minute walks without earbuds or replacing evening work with a hobby, experience rapid improvements. He emphasizes that the goal is not to stop exercising but to balance the stress equation: if you press hard on action, you must press hard on relaxation. This approach can break plateaus that seemed insurmountable.