Trap Bar Deadlift vs Squat for Strength and Lean Mass: What the Research Shows

When it comes to building strength and lean muscle, two of the most commonly debated lower-body exercises are the squat and the deadlift. Both are staples in resistance training programs, but the question of which one produces better results — or whether one is superior at all — is one that trainers and athletes have long debated. A recent eight-week study set out to compare the trap bar deadlift and the barbell half squat in recreationally active females, measuring outcomes across maximal strength, power performance, and lean mass. The findings offer practical insight for anyone looking to structure a more effective lower-body training program.

What This Study Examined

Researchers wanted to understand whether the trap bar deadlift or the barbell half squat would produce greater improvements in key performance and body composition markers over an eight-week resistance training period. Specifically, the study looked at three primary outcomes: maximal strength, power performance, and lean mass.

The trap bar deadlift has gained popularity in recent years as an accessible and joint-friendly alternative to the conventional barbell deadlift. The half squat, meanwhile, is a well-established compound lower-body movement. The researchers were interested in whether one exercise offered a measurable advantage over the other when applied consistently over two months of structured training.

How the Study Was Conducted

The trial ran for eight weeks and involved recreationally active females as participants. This population is worth noting — these were not elite athletes or competitive powerlifters, but women who were already somewhat active and had some experience with exercise. This makes the findings more applicable to a general fitness audience.

Participants were assigned to train with either the trap bar deadlift or the barbell half squat as their primary lower-body movement. Both groups followed resistance training programs over the eight-week period, allowing researchers to compare outcomes between the two exercise conditions.

Measurements were taken to assess:

• Maximal strength — how much weight participants could lift

• Power performance — measures related to explosive output

• Lean mass — changes in muscle tissue over the course of the study

By controlling for exercise type while keeping other training variables consistent, the researchers were able to isolate the effect of each movement on these outcomes.

Key Findings

The results of the eight-week trial showed that both exercises produced meaningful improvements across all three outcome categories. According to the study:

• Both the trap bar deadlift and the barbell half squat improved maximal strength in recreationally active females over the eight-week period

• Power performance increased in both groups, suggesting that either exercise can contribute to improvements in explosive output

• Lean mass improved in both groups, indicating that both movements are effective tools for building muscle when applied consistently over time

• The study did not find one exercise to be definitively superior to the other across all measured outcomes

The results suggest that the two exercises are broadly comparable when it comes to producing strength, power, and body composition improvements over an eight-week training block in this population.

What This Means for Training

Taken together, these findings suggest that both the trap bar deadlift and the barbell half squat are effective choices for recreationally active individuals looking to improve their strength, power, and lean mass. Neither exercise appears to have a clear, across-the-board advantage over the other based on this study's results.

From a coaching perspective, this is actually useful information. It means that exercise selection for lower-body training doesn't necessarily need to hinge on which movement is "better" in absolute terms. Instead, factors like individual mechanics, comfort with the movement pattern, access to equipment, and specific training goals can guide the decision.

The trap bar deadlift, for example, may be a more accessible starting point for individuals who are newer to lifting or who find conventional squat patterns uncomfortable. The barbell half squat, on the other hand, is a movement with decades of use in structured resistance training programs and is widely understood by coaches and athletes alike.

For anyone training in Reno with a personal trainer, findings like these reinforce the idea that a well-designed program can be built around either movement — what matters most is consistency, progressive overload, and sound technique over time.

It is also worth considering that this study focused on recreationally active females specifically. The principles may broadly apply to other populations, but the results should not be assumed to transfer universally without additional evidence.

Limitations of the Study

As with any research, it is important to consider the limitations before drawing sweeping conclusions:

• Population specificity: The study was conducted exclusively with recreationally active females. Results may not translate directly to males, beginners, highly trained athletes, or older adults.

• Short duration: Eight weeks is a relatively brief training period. Longer studies would help clarify whether differences between the two exercises emerge over months or years of training.

• Exercise variation: The study used the trap bar deadlift and the barbell half squat, not a full-depth squat. Results may differ if a full squat were compared against the deadlift variation.

• Sample size: Based on the nature of this type of study, sample sizes in controlled exercise trials are often modest, which can limit the statistical power of the findings.

These limitations don't undermine the study's value, but they do serve as a reminder that no single study should be treated as the final word on a training question.

Conclusion

This eight-week trial found that both the trap bar deadlift and the barbell half squat are effective exercises for improving maximal strength, power performance, and lean mass in recreationally active females. Neither movement emerged as clearly superior, which suggests that both are legitimate options for structuring a lower-body resistance training program.

Research like this helps inform how coaches approach exercise selection — reinforcing that a variety of well-executed compound movements can drive meaningful results when programmed thoughtfully. Rather than fixating on finding the single "best" exercise, the more practical takeaway is that consistency and proper technique with either movement are likely to produce positive outcomes over time.

If you're looking to build a structured training program around evidence-based exercise selection, working with a qualified coach can help you apply findings like these in a way that fits your goals. You can explore Atlas Personal Trainings in Reno to find a coach who can guide your programming.

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• Can Deadlifts Improve Explosive Power and Vertical Jump?

• Hip Thrust vs Squat for Glute Growth

• How Squat Depth Affects Muscle Growth

Source

Comparison of resistance training using barbell half squats and trap bar deadlifts on maximal strength, power performance, and lean mass in recreationally active females. BMC Sports Science, Medicine and Rehabilitation. 2024. https://link.springer.com/article/10.1186/s13102-024-00911-8