Understanding the Hours Between Exercise

The soleus is often called the body's "second heart" because of its important role in circulation. Unlike your actual heart, which pumps blood from your chest to the rest of your body, the soleus acts as a supporting pump that helps move blood back from your legs toward your heart. Every time you walk or move your feet, the soleus contracts rhythmically, compressing veins in your calf to push blood upward against gravity. When you sit for long periods, your soleus becomes less active, and this natural "pumping" action slows down. Learn more about the second heart →

No. Exercise is one of the best things you can do for your health, but it does not "cancel out" the effects of prolonged sitting. Think of it this way: eating one healthy meal doesn't undo an entire week of poor nutrition. Similarly, one hour at the gym doesn't completely reverse eight hours of sedentary behaviour. Researchers now recommend both regular exercise and reducing prolonged sitting throughout the day. They are complementary, not interchangeable. Read more about sitting and exercise →

Heavy legs after prolonged sitting are often related to reduced circulation. When you sit for extended periods, your soleus muscle becomes far less active than it is during walking. This means less of the natural "pumping" action that helps move blood from your legs back toward your heart. Blood can pool in the lower legs, leading to a feeling of heaviness, fatigue or discomfort. This is one of the reasons researchers are increasingly interested in understanding what happens inside the body during prolonged sitting. Learn about heavy legs and circulation →

Post-lunch sleepiness, often called the "afternoon slump," can have several causes: what you ate (large meals, high-carbohydrate foods), sleep quality the night before, and natural circadian rhythms. Researchers are also exploring another important factor: prolonged sitting. When you remain seated for long periods, your body's natural movement patterns change. Reduced muscle activity, particularly in muscles like the soleus, may influence how your body processes glucose and manages energy throughout the day. Explore Soleus Health and energy →

No. Soleus Health is not a medical condition, diagnosis or disease. It is a framework for understanding one of the body's most overlooked muscles, the soleus, and how it supports circulation, metabolism and energy during everyday life, especially during prolonged sitting. Think of it as a way of thinking about health that complements traditional approaches like nutrition, exercise and sleep. If you have concerns about your health, always consult a qualified healthcare professional. What is Soleus Health? →

Yes. Emerging research suggests that prolonged sitting may influence how the body processes glucose. A landmark 2022 study from the University of Houston found that a specific seated soleus movement performed under controlled laboratory conditions reduced the rise in blood sugar after a meal by approximately 52% while reducing insulin requirements by approximately 60%, compared with inactive sitting. These findings suggest that the soleus muscle may play a more important metabolic role than previously recognised. It is important to note that these results relate to a specific research protocol and should not be interpreted as clinical outcomes for every type of soleus movement. Read about Soleus Health and blood sugar →

You're not alone. Most people have never heard of the soleus muscle, despite its important role in everyday health. There are several reasons: healthcare has traditionally focused on diagnosing disease; fitness has focused on exercise and workouts; wearable technology has focused on the wrist (steps, heart rate, sleep). Very little attention has been given to understanding what happens inside specific muscles during the long hours we spend sitting. That is beginning to change. Researchers are paying greater attention to sedentary physiology, and advances in sensing technology are making it increasingly practical to study physiological responses during everyday life. Why have you never heard of it? →

No. Standing and movement are not the same thing. While standing is often better than sitting, it does not provide the same physiological benefits as regular movement. The soleus muscle becomes active when you move, particularly when you walk or repeatedly contract your calf muscles. Simply standing with minimal movement does not activate the soleus in the same way. Reducing prolonged sitting is important. But replacing sitting with standing is not the same as incorporating regular movement throughout the day. Read about sitting vs standing →

No. Sedentary lifestyles affect people of all ages. Modern work patterns mean that students, young professionals, parents and older adults alike may spend 8–10 hours each day sitting. The physiological effects of prolonged sitting are relevant to anyone who spends significant time in a chair, regardless of age. Soleus Health is about understanding what happens inside the body during those hours, and it applies to anyone who sits for work, study or daily life. Learn more about Soleus Health in everyday life →

2HEART is a health technology company dedicated to making Soleus Health understandable, measurable and part of everyday life. We are building technology that combines guided soleus movement with physiological sensing to help people better understand how their bodies respond during prolonged sitting. Our ambition is not simply to build a device. It is to help people understand a part of health that has been hiding in plain sight. About 2HEART →

During prolonged sitting, several physiological changes can occur: reduced muscle activity (muscles like the soleus become far less active than during walking), slower circulation (the natural "pumping" action that moves blood from the legs back toward the heart slows down), changes in metabolism (the body may process glucose differently during prolonged inactive periods), and reduced energy (fatigue and reduced alertness are commonly reported). Researchers continue to study these effects to better understand how prolonged sitting influences health. What happens during sitting? →

Researchers recommend a combination approach: regular exercise (this remains one of the best things you can do for your health), break up sitting time (try to stand, stretch or move briefly every 30–60 minutes), incorporate movement into your day (walking, stair climbing and calf movements all help activate the soleus), and stay curious (understanding what happens inside your body during sitting is the first step toward better habits). Soleus Health is about completing the picture, not replacing exercise, but understanding the hours between. Explore Soleus Health in everyday life →

Yes. Interest in the soleus muscle has grown significantly in recent years. A landmark 2022 study from the University of Houston demonstrated that a specific seated soleus movement performed under controlled laboratory conditions reduced the rise in blood sugar after a meal by approximately 52% while reducing insulin requirements by approximately 60%, compared with inactive sitting. These findings challenged the long-held assumption that meaningful metabolic improvements require vigorous exercise. Researchers around the world continue to study how prolonged sitting affects the body and how regular movement throughout the day may support healthier physiology. Read about the science behind Soleus Health →

Regular fitness focuses on intentional exercise, going to the gym, running, cycling, or doing structured workouts. Soleus Health focuses on understanding what happens between those workouts. Specifically: what happens inside the body during the 8–10 hours we spend sitting? How do muscles like the soleus support circulation and metabolism during everyday life? How can we better understand the hours between exercise? Soleus Health complements fitness. It does not replace it. Understanding the hours between exercise →