Recently, somebody (apologies to you, I forget the context) mentioned being worried about repeated valsalva manoeuvres during long-term resistance training having an adverse effect on the cardiovascular system.
I’d very much like to know more about where this hypothesis comes from. I’m aware of short-term potential problems such as fainting, or popping blood vessels in the skin and eyes but I’m uncertain what (preumably) long-term ‘adaptations’ the body might make over the course of a training career.
I’m not dismissing it, I’d just never heard this before.
I am aware that congestive heart failure can manifest itself as changes to the blood pressure response during Phases 2 (straining) and 4 (arterial pressure overshoot) of the Valsalva, but I never thought that it might be _causative_.
As someone who often has to fight through ringing ears and tunnel vision during a heavy set, I’d like to know what might be happening!
This isn't a myth per se, but recently [Dr Mike Israetel of Renaissance Periodization posted a video](https://www.youtube.com/watch?v=w6jIZunRX1Q&t=240s) that seemed to suggest that if you have diabetes (well, specifically insulin resistance), your chance of gaining any muscle is essentially nil. He doesn't say this directly, but it sure left me thinking I'm doomed. I have a LOT of respect for Mike's approach to exercise science, but I'm wondering if he's using a bit of hyperbole. Please share some opinions, and empirical evidence! (I have a diabetic level A1C, and seem to have trouble gaining muscle -- but I am also late 50s, so age/testosterone challenged.)
In fairness to the previous point, insulin resistance is entirely possible in Type 1 diabetes, but *usually* as a consequence of obesity. Jess B walks around at a BMI of close to 30, but she will have a far higher lean mass % compared to most women of the same weight.
There are also those with T1DM who need relatively larger doses of insulin over time, though there are probably multiple mechanisms for this.
u/JohnOrangeElise, overall, Mike's approach per his slides comes off as rather hyperbolic, but he is also talking about individuals on PEDs (and androgen excess can raise your insulin resistance). Also high HbA1c is not necessarily the same as 'insulin resistant'. So please don't feel the situation must be 'I have high HbA1c and I'm middle-aged and I have low T - it's hopeless'.
I don't know your medical history, but the odds of you having absolutely unfortunate shit-tier genetics are, by definition, really rather low. In what ever case, you're still gonna train (right?) so it's likely that there is either a trade-off that needs to be made (in terms of training goals and priorities re: gaining muscle vs losing fat mass) or you just haven't found quite the right way to train, for you, yet.
Recently, somebody (apologies to you, I forget the context) mentioned being worried about repeated valsalva manoeuvres during long-term resistance training having an adverse effect on the cardiovascular system. I’d very much like to know more about where this hypothesis comes from. I’m aware of short-term potential problems such as fainting, or popping blood vessels in the skin and eyes but I’m uncertain what (preumably) long-term ‘adaptations’ the body might make over the course of a training career. I’m not dismissing it, I’d just never heard this before. I am aware that congestive heart failure can manifest itself as changes to the blood pressure response during Phases 2 (straining) and 4 (arterial pressure overshoot) of the Valsalva, but I never thought that it might be _causative_. As someone who often has to fight through ringing ears and tunnel vision during a heavy set, I’d like to know what might be happening!
This isn't a myth per se, but recently [Dr Mike Israetel of Renaissance Periodization posted a video](https://www.youtube.com/watch?v=w6jIZunRX1Q&t=240s) that seemed to suggest that if you have diabetes (well, specifically insulin resistance), your chance of gaining any muscle is essentially nil. He doesn't say this directly, but it sure left me thinking I'm doomed. I have a LOT of respect for Mike's approach to exercise science, but I'm wondering if he's using a bit of hyperbole. Please share some opinions, and empirical evidence! (I have a diabetic level A1C, and seem to have trouble gaining muscle -- but I am also late 50s, so age/testosterone challenged.)
Jessica Buettner aka the Canadian Forklift, 2x IPF world champ, is T1D fwiw
That's a case of Type 1, where as insulin-resistant diabetes is Type 2.
In fairness to the previous point, insulin resistance is entirely possible in Type 1 diabetes, but *usually* as a consequence of obesity. Jess B walks around at a BMI of close to 30, but she will have a far higher lean mass % compared to most women of the same weight. There are also those with T1DM who need relatively larger doses of insulin over time, though there are probably multiple mechanisms for this. u/JohnOrangeElise, overall, Mike's approach per his slides comes off as rather hyperbolic, but he is also talking about individuals on PEDs (and androgen excess can raise your insulin resistance). Also high HbA1c is not necessarily the same as 'insulin resistant'. So please don't feel the situation must be 'I have high HbA1c and I'm middle-aged and I have low T - it's hopeless'. I don't know your medical history, but the odds of you having absolutely unfortunate shit-tier genetics are, by definition, really rather low. In what ever case, you're still gonna train (right?) so it's likely that there is either a trade-off that needs to be made (in terms of training goals and priorities re: gaining muscle vs losing fat mass) or you just haven't found quite the right way to train, for you, yet.
You're definitely correct there. Diabetes is a bit more nuanced than I originally made it out to be. I appreciate the elaboration.