skip to main content

Thorne Whey Protein Isolate - NSF Certified for Sport Chocolate -- 14 Packets


  • NSF certified sport
Thorne Whey Protein Isolate - NSF Certified for Sport Chocolate
  • Our price: $48.00


  • +

Added to My List as a guest.

Your guest list will be saved temporarily during your shopping session.

Sign in to add items to your saved list(s).

1 item added to your list

Thorne Whey Protein Isolate - NSF Certified for Sport Chocolate -- 14 Packets

Oops! Something went wrong and we were unable to process your request. Please try again.

Save 20% off Code SAVECYBER Ends: 12/08/25 at 7:00 a.m. ET

  • Guaranteed Authentic

    100% Authentic

    • ✓ Products sourced directly from brands or authorized distributors
    • ✓ No third-party resellers
    • ✓ Products stored and shipped in conditions that ensure quality
    • ✓ Vitacost is 100% committed to your well-being and safety

Thorne Whey Protein Isolate - NSF Certified for Sport Chocolate Description

  • Whey Protein Isolate
  • 21 Grams of Bioavailable Protein
  • With Flavors and Sweeteners Derived from Natural Sources
  • Foundational
  • Sports Performance
  • Gluten Free
  • NSF Certified Sport

Great tasting, high-quality whey protein designed for athletes, aging individuals, and anyone requiring additional support for maintaining healthy muscle mass.

 

 

Many trainers and dieticians recommend consuming protein with every meal. This is particularly important for individuals needing support for a workout routine, or those looking to maintain a healthy weight.

 

 

Protein is essential for muscle repair and maintenance, and whey protein provides a complete amino acid profile, optimized for absorption and assimilation. Supplementing the diet with a high-quality whey protein can make reaching your macro goals easier.

 

 

Benefits of Thorne’s Whey Protein Isolate:

»  Helps maintain healthy muscle mass
»  Supports muscle repair after injury or training
»  Benefits a healthy weight
»  Aids in the digestion and assimilation of protein with added bromelain and papain
»  Balanced amino acids profile, including branched-chain amino acids (BCAAs)

 

 

The NSF Certified for Sport® certification program, verifies that:

  • Testing products so they do not contain any of 290 substances banned by major athletic organizations
  • The contents of the supplement actually match what is printed on the label
    • Toxicological review of ingredients and verification of the product


Directions

Suggested Use: Mix 1 packet with at least 8 ounces of water, juice, or preferred beverage daily or as recommended by your health-care practitioner.

 

Notice: Use this product as a food supplement only. Do not use for weight reduction.

Free Of
Gluten.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


Supplement Facts
Serving Size: One Packet (30.2 g)
Servings per Container: 14
Amount Per Serving% Daily Value
Calories100
Total Fat1 g1%
   Saturated Fat0.5 g3%
Cholesterol10 mg3%
Total Carbohydrate4 g1%
   Dietary Fiber1 g4%
   Total Sugars2 g
     Includes 1 g Added Sugars2%
Protein21 g42%
Calcium94 mg7%
Iron1 mg6%
Sodium105 mg5%
Potassium200 mg4%
Whey Protein Isolate25 g*
Proprietary Blend30 mg
   Bromelain*
   Papain*
Typical Amino Acid Amounts Per Serving:
Alanine1 g
Arginine0.6 g
Aspartic Acid2.1 g
Cysteine0.5 g
Glutamic Acid3.6 g
Glycine0.4 g
Histidine †0.4 g
Isoleucine †1.2 g
Leucine †2.2 g
Lysine †1.9 g
Methionine †0.5 g
Phenylalanine †0.7 g
Proline1.2 g
Serine1.1 g
Threonine †1.4 g
Tryptophan †0.4 g
Tyrosine0.6 g
Valine †1.2 g
†Essential Amino Acid
*Daily value not established.
Other Ingredients: Alkalized cocoa powder, chocolate flavor, evaporated cane juice sugar, rebaudioside A (from stevia), xanthan gum, carbooxymethylcelluylose gum.

Contains ingredient derived from milk (whey protein isolate).

Warnings

If pregnant, consult your health-care practitioner before using this product.

The product you receive may contain additional details or differ from what is shown on this page, or the product may have additional information revealed by partially peeling back the label. We recommend you reference the complete information included with your product before consumption and do not rely solely on the details shown on this page. For more information, please see our full disclaimer.
View printable version Print Page

One Fuels the Long Haul, the Other Fires the Sprint: Understanding Endurance and Stamina

[vc_row][vc_column][vc_column_text]When people talk about fitness performance, the terms stamina and endurance are often used interchangeably. While these two concepts do share a few similarities, they also have important distinctions and serve their own specific functions in your workout routine. Let’s explore the main differences between stamina and endurance, along with actionable steps to cultivate both in a way that honors and aligns with your wellness needs.

A Man Sprints on a Track, Representing Endurance vs Stamina.

What Is Endurance?

Starting with endurance, Frontiers in Physiology refers to endurance as the body’s metabolic, cardiovascular and muscular capacity to both economize and sustain movement for a prolonged amount of time. In other words, endurance is all about duration; how long you’re able to consistently perform an action, from hiking a trail to running a half-marathon, before fatigue sets in. Endurance allows the heart and lungs to circulate oxygen, the muscles to exert repetitive contractions and the metabolism to convert fuel into energy. All of these processes lead to functional gains in aerobic capacity. What does this mean for your fitness routine? In practical terms, if you start walking for 20 minutes five times a week, then gradually increase to 45 minutes, this reflects an endurance boost. Your body is learning how to sustain continual muscle repetition and efficient oxygen uptake, which allows you to exercise longer and cover more distance.

What Is Stamina?

On the other hand, stamina is the ability to maintain a high level of performance at a rigorous intensity. Frontiers in Sports and Active Living defines stamina as training your muscle fibers to rapidly consume energetic reserves and put forth the maximum amount of effort, while learning how to push beyond the onset and limits of fatigue. In other words, teaching your muscles to use energy quickly and work as hard as possible, even when you start to feel tired. Stamina requires both physical tolerance and mental resilience. This combination helps you withstand exhaustion, so you can keep moving with power and precision, even as the muscles start to tire out. Think of that final explosive burst you muster at the end of a workout to achieve the time or distance you’re aiming for. This is stamina. High-intensity interval training (HIIT) is ideal for increasing stamina. HIIT circuits activate the body’s aerobic (slow-twitch muscle) and anaerobic (fast-twitch muscle) capacity to increase strength resistance and cardiorespiratory fitness. Meanwhile, these exercises can also regulate cortisol to calm the nervous system and make the brain more adaptive to stress.

The Difference Between Endurance and Stamina

If endurance is the engine that spurs you on to continue moving at a steady, consistent pace, then stamina is the ignition fuel that enables you to press hard, recover and then repeat. For example, a soccer player who relies on short bursts of speed to switch directions, execute precise moves and outrun competitors is using stamina. Whereas a long-distance cyclist who maintains the same repetitive motion for hours is using endurance. There’s some overlap between stamina and endurance, but the primary distinction between them can be summed up in the following way:
  • Endurance: The duration of which you can sustain a consistent, repetitive action before muscular fatigue sets in.
  • Stamina: The intensity level at which you can perform while resisting the physical and mental effects of fatigue.

How to Increase Both Endurance and Stamina

As with introducing any fitness component to your exercise routine, it’s important to remember each body is unique. Check in with the signals your own body communicates and honor what it needs with intentional adjustments to account for soreness, discomfort, restrictions or dips in energy and performance. The Sports Journal suggests that moderate, progressive load increases are most sustainable for building stamina and endurance, so take it steady at first, then escalate the workout duration and intensity over time. Here’s how to get started.

Establish a goal and track how it feels.

Think about your current fitness levels. Can you walk at a fast pace for 20 minutes before tiring out? Can you perform 20 squats with 10-pound weights before your muscles feel spent? Now consider how your body reacts after exercise. Is the recovery quick and smooth or do you still notice soreness and fatigue the next day? This information reflects the baseline of where your endurance and stamina are right now. From there, you can determine a goal of how much you want them to increase. For example: “I will walk at a fast pace for 45 minutes,” or “I will perform 50 squats with 10-pound weights.” As you build to this objective, track the physical and mental sensations that come with it, then based on what your body communicates, either scale up or ease back.

Cultivate a foundation of consistency.

Aim for three to four sessions of aerobic movement per week, whether it’s cycling, swimming, running or walking. Start at your baseline (I.E., 20 minutes), then steadily increase the duration until you reach the established goal (I.E., 45 minutes). Frontiers in Physiology found that a consistent 12-week endurance program will boost various functional mechanics like speed, gait, aerobic capacity and oxygen uptake, all of which make it easier to sustain physical exertion at a pace that feels comfortable.

Focus on gradual boosts of intensity.

Once your endurance levels noticeably increase (I.E., you can sustain a consistent, moderate effort for a prolonged amount of time), introduce higher-intensity elements. For example, build faster intervals into your walking routine. Start with an easy pace for 3-5 minutes, then accelerate to a brisk pace for just 1 minute and continue this repetition for about 5–10 cycles. Over time, aim for one minute of sprinting. Research indicates that quick bursts of intensity at maximum effort lead to more efficient aerobic and anaerobic economy.

Incrementally blend the two together.

A typical week of building endurance and stamina might look like having two endurance sessions with 30–45 minutes of steady-state cardio exercise and two stamina sessions with 20 minutes of short HIIT and rest intervals. Make sure to build in at least one day of gentle movement, too. Stretching, walking or yoga, for instance, gives your body the rest it needs between sessions. Set aside time after each session to track your mental and physical sensations as well as your performance metrics. Over time, you’ll notice recurring patterns in terms of how much exertion your body can tolerate and how efficiently it can recover.

Build Endurance and Stamina to Reach Your Fitness Goals

Endurance is the reliable engine that allows you to cover long distances and stretches of time, while stamina is the power reserve that fuels you to maintain rigorous levels of intensity. Both are important and beneficial for overall fitness, but the key is to focus on incremental growth in your physical and mental capacity. Remember: this isn’t about forcing yourself to push toward maximum effort all the time. It’s about starting where you are and scaling up gradually, based on what’s right for your body and abilities. This is how you achieve sustainable outcomes that make your mind and body feel good![/vc_column_text][/vc_column][/vc_row][vc_row][vc_column][vc_text_separator title="Featured Products" border_width="2"][vc_row_inner][vc_column_inner width="2/12"][/vc_column_inner][vc_column_inner width="3/12"][vc_single_image image="189799" img_size="full" onclick="custom_link" img_link_target="_blank" css="" link="https://www.vitacost.com/legion-athletics-recharge-post-workout"][/vc_column_inner][vc_column_inner width="2/12"][/vc_column_inner][vc_column_inner width="3/12"][vc_single_image image="189797" img_size="full" onclick="custom_link" img_link_target="_blank" css="" link="https://www.vitacost.com/aloha-organic-plant-based-protein-bars-sampler-pack-2"][/vc_column_inner][vc_column_inner width="2/12"][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row]
Please enter a valid zip code
LVDC6