It is easy to forget who you are when other people decide it for you. Just four years ago, Sarah Infinger was trying to break free from the mold that others had cast for her. Whether it was her husband’s military career shaping her identity, or being reduced to the role of the ‘funny fat friend,’ Infinger weighed 371 pounds and felt like she had completely lost herself — not for lack of trying, but because she had spent years living by everyone else’s rules.
After years of cycling between hobbies, school programs, and diets, Infinger lacked the sustained motivation to see any goal through. Then, in March 2021, something shifted. She decided enough was enough.
“I didn’t start this journey to lose weight,” Sarah says. “I started it to stop disappearing. Every decision I made after March 2021 was intentional — even when it was terrifying.”
Keeping her new mindset front and centre, Infinger founded Sarah in All Sizes, a coaching platform where she helps others find their voice — by first finding her own.
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Success Is All About the Long Game
Going into her transformation, Infinger knew results would not come overnight. According to the CDC, nearly 42% of US adults live with obesity — a condition that is rarely resolved by willpower alone. Infinger approached her journey with a multidisciplinary support structure: medical oversight, consistent goal-setting, and a complete mindset overhaul.
“I worked with a team — not just a scale,” she says. “There was a bariatric specialist, a therapist who specialised in emotional eating, and a registered dietitian who helped me build a sustainable nutrition plan. None of this happened in a vacuum.”
Alongside her physical health journey, Infinger enrolled in a mortuary science degree programme — a choice that reflected her belief in personal connection over prestige. Within two months of starting, she landed a job in the field. She later graduated at the top of her class, a remarkable achievement given the competitive job market.
She was equally committed to documenting her progress publicly. Every post on social media was crafted with intention — not just to show weight loss, but to examine every emotional and psychological layer of her transformation.
Her authenticity resonated. Infinger eventually amassed over 1.5 million followers across Instagram, TikTok, Facebook, and YouTube.
Infinger Worked Through Self-Doubt to Get Ahead
The physical challenges of Infinger’s weight loss journey may have been complex, but they were nothing compared to her internal struggles. On top of frequently moving as a military spouse, Infinger was fairly nomadic.
She also faced challenges related to PCOS, all while working through the grief of losing her brother and one of her best friends.
Yet Infinger refused to give up, choosing to focus on showing up for herself daily. Now, she applies that same principle to her business. Infinger encourages her clients to follow in her footsteps even when they’re overwhelmed and unsure of where to begin.
Overcoming self-doubt, PCOS, and grief
The physical challenges of Infinger’s weight loss were complex, but her internal struggles were arguably harder to navigate. As a military spouse, she moved frequently — a nomadic lifestyle that made it difficult to build consistent routines or a stable support network.
She also faced the compounding challenge of Polycystic Ovary Syndrome (PCOS), a hormonal condition affecting approximately 1 in 10 women of reproductive age, according to the National Institutes of Health. PCOS is widely associated with insulin resistance, weight gain, and metabolic dysfunction — making weight loss significantly harder than it is for the general population.
On top of this, Infinger was grieving the loss of her brother and one of her closest friends. “Grief and weight are both things people tell you to just push through,” she says. “But you can’t outrun either of them. You have to go through them.”
She refused to give up. Instead, she anchored herself to a single principle: show up for yourself every day, even when motivation is gone. That same discipline now forms the foundation of her coaching methodology.
Sarah’s transformation timeline
- March 2021: Began her health journey at 371 lbs with medical and psychological support
- October 2021: Enrolled in mortuary science degree, secured a job within two months
- May 2022: Launched Sarah in All Sizes coaching platform
- December 2023: Surpassed 1 million followers across social platforms
- Early 2024: Reached goal weight, having lost 210 lbs total
- 2025–present: Expanding into public speaking, life coaching, and an upcoming book
What comes next for Sarah Infinger?
Rather than sugarcoating her journey, Infinger leads with transparency. She does not pretend the process was easy, that setbacks did not happen, or that she woke up one day simply motivated. She is honest about the days she wanted to quit — and why she did not.
“I don’t expect perfection from my clients because I never expected it from myself,” she says. “What I do expect is that they keep showing up. That is the whole job.”
Looking ahead, Infinger is expanding her impact through public speaking engagements, one-on-one life coaching, and a book that will document her journey in full. Her message is simple but powerful: isolating as life can feel, you always have the ability to choose yourself — and that choice is the beginning of a new story.
Frequently asked questions
How long did Sarah Infinger’s weight loss take?
Sarah began her transformation in March 2021 and lost 210 lbs over approximately three years, reaching her goal weight in early 2024.
Did Sarah Infinger have bariatric surgery?
Sarah has not publicly disclosed specific surgical interventions. She has confirmed she worked with a medical team including a bariatric specialist and a therapist specialising in emotional eating.
How does PCOS affect weight loss?
PCOS causes hormonal imbalances that can lead to insulin resistance and increased fat storage, making weight loss more difficult. The NIH recommends a combination of lifestyle intervention, dietary management, and where appropriate, medication. Learn more at the NICHD PCOS resource page.
Where can I follow Sarah Infinger?
You can follow Sarah on Instagram, TikTok, Facebook, and YouTube. Her coaching services are available through Sarah in All Sizes.
