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Today’s Health Upgrade

• Why GLP-1 medications offer much more promise than weight loss

• The performance downfall most people overlook

• How to fix weekend overeating

On Our Radar 
GLP-1 Medications Might Do More Than Suppress Appetite

Most people know GLP-1 drugs for how they curb hunger and drive weight loss. And that’s caused a lot of differing opinions. 

But a new clinical trial is pointing to something that could change how people understand these medications and how they influence behavior.

Research suggests GLP-1 medications target craving and addiction itself, not just the urge to eat, including the desire to drink alcohol.

A randomized controlled trial found that semaglutide (a GLP-1 receptor agonist) significantly reduced heavy drinking days in adults with alcohol use disorder and obesity — raising a bigger question about whether GLP-1 receptor agonists might help treat other addictive behaviors beyond food.

Researchers recruited treatment-seeking adults with both moderate-to-severe alcohol use disorder and clinical obesity, randomized them to once-weekly semaglutide (at the 2.4mg weight-loss dose) or a placebo injection, and followed them for 26 weeks. 

Everyone in the trial also received cognitive behavioral therapy. At baseline, participants were averaging around 17 heavy drinking days per month. 

By the end of the trial, the GLP-1 group had reduced heavy drinking days by 41 percent, compared to 26 percentage points in the therapy group. 

For context, semaglutide outperformed the effect sizes typically seen with naltrexone and acamprosate, the two medications currently approved specifically for alcohol use disorder.

The likely reason comes down to where GLP-1 receptors live. They're not only in the gut and pancreas, regulating blood sugar and appetite, but they're also in the brain's reward and motivation centers, including areas that process craving and the dopamine-driven pull of addictive behaviors. 

The belief is that semaglutide quiets those signals. Food noise was already the accepted term. The emerging question is whether alcohol noise and, potentially, other reward-driven urges are part of the same system.

That said, more research should help provide more clarity. This was a single trial in people who met clinical criteria for alcohol use disorder, not social drinkers or people who occasionally overdo it. 

What you're watching unfold isn't a prescription for recreational drinkers. It's something more foundational: early evidence that a class of drugs already reshaping how we treat obesity might also change how we understand and treat the biology of compulsion itself. That's worth paying attention to.

Together With LMNT
The Performance Problem Most People Never Suspect

Most people picture dehydration as a dramatic event: dizziness, cramps, dry mouth, someone handing you a Gatorade on the sideline. What they don't picture is their Tuesday afternoon. Their mediocre workout. The afternoon they couldn't quite focus. The run that felt harder than it should have.

That version of dehydration is far more common, and almost nobody catches it.

Losing as little as 1 to 2 percent of your body weight in fluid — an amount most people never notice — is enough to meaningfully impair both physical and mental performance.

Researchers published a systematic review and meta-analysis analyzing 64 trials to understand what happens to performance after dehydration, and how rehydration can benefit your mind and body. 

Participants in the reviewed studies lost between 1.3 and 4.2 percent of their body mass through dehydration. To put that in real terms: for a 180-pound person, 1.3 percent is less than 2.5 pounds of fluid, the kind of deficit that can accumulate over a morning without anyone thinking twice.

The performance hit is real. Dehydration impairs exercise performance, degrades motor skills, and, in some studies, has been associated with effects on memory and mood. 

And here's what makes it worse: thirst is a lagging indicator. By the time you feel it, you're already behind.

The genuinely encouraging part of this research is what happened when people drank fluid afterward, even when they didn't fully rehydrate. 

Drinking something can quickly improve your performance. It didn't matter much how much participants drank or when; partial rehydration still moved the needle. The biggest gains came during longer efforts and in hotter environments, but the benefit showed up across conditions.

You don't need a perfect hydration protocol to feel a difference. If you have 20 minutes before training and realize you've barely touched water all morning, drink something. If you're between back-to-back obligations, drink what you can. The body responds quickly, and even an incomplete response beats doing nothing.

The more important habit is upstream: stop treating hydration as something you address only when you're obviously thirsty. By then, your workout, your focus, and your energy are already paying the price for something that was entirely preventable.

What you put in your body matters as much as when you do it.

Electrolytes move water. Sodium, potassium, and chloride act as signals that tell your body where to send fluid, and how much of what you drink actually gets absorbed. They also trigger the electrical impulses that fire your muscles and keep your nerves responsive. When your electrolyte balance is off, drinking more water doesn't fully solve the problem. It dilutes it.

LMNT was designed to give your body the electrolytes it actually needs, with nothing it doesn't.

Each stick pack delivers sodium, potassium, and magnesium to restore what sweat and dehydration pull out of you. No sugar. No artificial colors. No fillers. Just the electrolytes, in doses that are actually meaningful.

It's what we reach for before or after a hard training session, and on the afternoons when the focus starts slipping and we realize we’ve gone far too long without water.

APC readers can get a free LMNT Sample Pack — one of every flavor — with any drink mix purchase. Click here to claim yours, and your sample pack will be automatically added to your cart.

Drink something. Make it count.

Better Questions, Better Solutions 
Your Weekend Isn't a Discipline Problem

The Monday version of you makes promises the Friday version never signed off on. By 4 pm on Friday, the "eat cleaner, train harder, drink less" plan starts to feel less like identity and more like a costume. By Sunday night, you're apologizing to Monday.

But since it’s only Wednesday, this is your chance to not only salvage this week, but also set yourself up for a higher likelihood of weekly success.

Old Question: How do I stop undoing my progress every weekend?
Better Question: What need am I trying to fill on weekends that I ignore Monday through Friday?

The Reframe

The weekend isn't where your discipline breaks. It's where your week catches up with you. Five days of output without much input. Five days of performing your life instead of living it. Five days of "I'll get to that later," and Saturday is later.

When we treat this as a willpower problem, the instinct is to go harder on control. Stricter rules. Cleaner meal prep. More pressure. But you can't out-discipline a legitimate unmet need. The behavior keeps returning because the need keeps returning.

Recovery programs have long used a check-in called HALT — hungry, angry, lonely, tired. Four states that push people toward impulsive choices. It's a practical heuristic, not a proven scientific law, but the spirit holds up: when basic needs go unmet, we don't make our sharpest decisions.

That matters because the research on weekend eating is remarkably consistent. Americans eat roughly 150 to 180 more calories per day (and sometimes much higher) on Saturdays than on weekdays, with lower overall diet quality from Friday through Sunday. 

In one year-long study of adults aged 50 to 60, that weekend surplus was enough to stall weight loss week after week, even while people were successfully cutting calories Monday through Friday.

The real question is why. It isn't simply that pizza appears on Fridays. 

One well-supported psychological framework (self-determination theory) identifies three needs that shape how we behave: autonomy (a sense of choosing your own path), competence (feeling capable in what you do), and relatedness (warm connection with others). 

Research links chronic frustration of these needs to less healthy coping patterns: more comfort eating, more alcohol, more passive screen time.

To be clear, no study has directly tested whether a weekday spent short on these needs is what drives weekend overeating. But the pieces line up. Feed yourself real meals, connect with people who matter, and carve out genuine choice in your week, and the weekend tends to feel less like a rescue mission.

Before the weekend starts, ask yourself one question: What did I not get this week? 

Is it rest? Time with a friend? An actual break from the inbox? A walk without a podcast? There’s likely something that’s missing.

Put one of those things on the calendar before Saturday morning. Not as a reward, but as infrastructure. You're not indulging. You're preventing a deficit from showing up as a binge.

Progress isn't protected by rules. It's protected by getting what you need before you start negotiating.

The Positive Corner of The Internet
About Arnold’s Pump Club Editorial Standards

We do things a bit differently here, starting with transparency.

1. The Content: All APC emails are researched, written, and fact-checked by the APC editors (see bottom of the email), with written contributions from Arnold (noted with “Arnold’s Corner”). Links take you to original studies (not second-hand sources).

2. Does AI play a role? Not for the primary content, but it is used in two ways. The main items are original content written by the APC team. The summaries at the end are AI-generated based on the human-written content above. We also use an AI tool to review our interpretations of the research and ensure scientific accuracy. We don’t assume AI is right, but we use technology to hold ourselves accountable.

3. Yes, we have partners (all clearly noted). Why? Because it allows us to keep the APC emails free. We first test products, and then reach out to potential partners who offer ways to help you improve every day. The bar is set high, and to date, we have turned down millions in ad deals. (Example: we will not partner with any non-certified supplements or those without evidence in human trials). If we won’t buy the product, we won’t recommend it to you. And if there’s no evidence it works, then there’s no place for it here.

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Publisher: Arnold Schwarzenegger​

Editors-in-chief: Adam Bornstein and Daniel Ketchell