The Hardness Factor: How to Achieve Your Best Health and Sexual Fitness at Any Age

Name: The Hardness Factor: How to Achieve Your Best Health and Sexual Fitness at Any Age
Price: 2.99 USD
Availability: InStock
Rating: 4.2 (152 reviews)
Author: Steven Lamm

by Steven Lamm

Nonfiction Self Help

4.2 (152)

4.2 stars from 152 reviews

$2.99KU80% off peak

Last checked: Apr 28, 2026

Read free with Kindle Unlimited

Price history: $1.99 – $15.19

Good deal — this is near the lowest price we've tracked.

Price range: $1.99 – $15.19

Buy on Amazon - $2.99

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Perfect for you if...

You're a man concerned about sexual performance and want practical, medical advice rather than marketing hype about supplements.
You're interested in the connection between cardiovascular health and sexual function, and want evidence-based nutrition and exercise protocols.
You like straightforward health books that treat you like an adult and include actionable meal plans from a professional chef.

Maybe not for you if...

You're looking for philosophical or emotional explorations of masculinity or intimacy.
You prefer fiction or narrative-driven books to prescriptive health regimens.
You're uncomfortable with the explicit focus on erectile function as a health metric.

About this book

The Hardness Factor presents a health and fitness program centered on erectile quality as an indicator of male wellness. Dr. Steven Lamm argues that erectile function can serve as a motivator for men to improve their overall health across all ages. The book offers science-based regimens focusing on nutrition, supplements, and exercise designed to enhance erectile quality. Following these programs aims to improve overall health, produce stronger and longer-lasting erections, increase strength and fitness, restore self-confidence, and enhance sexual satisfaction. The guide includes two main programs: "The Four-Day Insurance Policy" for quick results, and the "Six-Week Hardness Factor Program" for more comprehensive improvements to sex drive, stamina, hardness, and health. The book also features recipes by chef Waldy Malouf intended to support nutritional health and sexual function. Dr. Lamm, a New York clinician and author, provides straightforward guidance for men of all ages, explaining how penile health reflects broader aspects of male health.

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Price History

Kindle price over time. Green zones = periods when the book was free.

$1.99 – $15.19

Currently on sale at $2.99 — 80% off peak. Price has dropped 19 times over the last 6 years. Goes on sale roughly every 39 days. Typically stays discounted for 63 days.

Sales Rank

Amazon sales rank: lower number = better selling book. #1 is the bestseller.

Currently around #368K in the Kindle store — a niche title. Climbing the charts — 33% improvement recently.

Rating & Reviews

Purple line = star rating over time. Blue area = total review count growth.

Currently 4.2★ from 152 reviews

Review activity has been quiet recently. Rating has remained stable at 4.2 over the tracking period.

Sale Prediction

Actual Predicted

This book is currently discounted at $2.99. It typically returns to around $15.19.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.