diff --git a/CLAUDE.md b/CLAUDE.md
index e598a554..eddf1ad0 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -48,7 +48,7 @@ Tests require real OrangeTheory credentials. Set `OTF_EMAIL` and `OTF_PASSWORD`
 
 ## API Versioning and Dual Endpoints
 
-OTF has two parallel API surfaces that return overlapping but structurally different data. Understanding which is which is critical before making changes.
+OTF has multiple API surfaces that return overlapping but structurally different data. Understanding which is which is critical before making changes.
 
 ### V1 ("member" API) vs V2 ("classes" API)
 
@@ -72,6 +72,19 @@ OTF has two parallel API surfaces that return overlapping but structurally diffe
 - **Studio data varies by endpoint**: The v1 bookings endpoint returns a minimal studio object. `get_classes` and `get_bookings` enrich it by fetching full `StudioDetail` via threaded calls to `/mobile/v1/studios/{uuid}`.
 - **`OtfClass` comes from the classes endpoint, not the bookings endpoint**: It's enriched with studio data post-fetch. The raw API response has a different studio shape than what the model exposes.
 
+### Gateway API ("consumer-mobile" / trends)
+
+A third API surface added in app v5.6.0, serving workout trends data.
+
+| Concept | Gateway |
+|---|---|
+| Base URL | `api.gateway.orangetheory.com` |
+| Client method | `gateway_request()` |
+| Endpoints | `GET /consumer-mobile/v1/users/me/workout-stats/{statsKey}`, `GET /consumer-mobile/v1/users/me/workout-stats/preview` |
+| Auth | Same Cognito bearer token as v1/v2 |
+| Response format | snake_case JSON (unlike the camelCase used by some v1/v2 endpoints) |
+| Available stat keys | `splat_points`, `average_hr`, `peak_hr`, `tread_top_speed`, `rower_500m_split_time`, `rower_top_power` |
+
 ### Two-layer architecture (Client → Api)
 
 Each domain has a `*Client` (raw HTTP, returns dicts) and a `*Api` (business logic, returns models):
@@ -80,8 +93,9 @@ Each domain has a `*Client` (raw HTTP, returns dicts) and a `*Api` (business log
 - `StudioClient` / `StudioApi` — raw HTTP calls vs typed studio operations
 - `WorkoutClient` / `WorkoutApi` — raw HTTP calls vs typed workout operations
 - `MemberClient` / `MemberApi` — raw HTTP calls vs typed member operations
+- `TrendClient` / `TrendApi` — raw HTTP calls vs typed workout trends/stats operations
 
-The `*Client` classes are internal; the `*Api` classes are what users interact with via `Otf.bookings`, `Otf.studios`, etc.
+The `*Client` classes are internal; the `*Api` classes are what users interact with via `Otf.bookings`, `Otf.studios`, `Otf.trends`, etc.
 
 ### Testing with fixtures
 
diff --git a/src/otf_api/api/api.py b/src/otf_api/api/api.py
index c856d33d..84434e58 100644
--- a/src/otf_api/api/api.py
+++ b/src/otf_api/api/api.py
@@ -5,6 +5,7 @@
 from .client import OtfClient
 from .members import MemberApi
 from .studios import StudioApi
+from .trends import TrendApi
 from .workouts import WorkoutApi
 
 
@@ -24,6 +25,7 @@ class Otf:
     members: MemberApi
     workouts: WorkoutApi
     studios: StudioApi
+    trends: TrendApi
 
     def __init__(self, user: OtfUser | None = None):
         """Initialize the OTF API client.
@@ -37,6 +39,7 @@ def __init__(self, user: OtfUser | None = None):
         self.members = MemberApi(self, client)
         self.workouts = WorkoutApi(self, client)
         self.studios = StudioApi(self, client)
+        self.trends = TrendApi(self, client)
 
         self._member: models.MemberDetail | None = None
 
diff --git a/src/otf_api/api/client.py b/src/otf_api/api/client.py
index c8c7a583..1755ee1a 100644
--- a/src/otf_api/api/client.py
+++ b/src/otf_api/api/client.py
@@ -20,6 +20,7 @@
 API_BASE_URL = "api.orangetheory.co"
 API_IO_BASE_URL = "api.orangetheory.io"
 API_TELEMETRY_BASE_URL = "api.yuzu.orangetheory.com"
+API_GATEWAY_BASE_URL = "api.gateway.orangetheory.com"
 HEADERS = {
     "content-type": "application/json",
     "accept": "application/json",
diff --git a/src/otf_api/api/trends/__init__.py b/src/otf_api/api/trends/__init__.py
new file mode 100644
index 00000000..12c725f1
--- /dev/null
+++ b/src/otf_api/api/trends/__init__.py
@@ -0,0 +1,3 @@
+from .trend_api import TrendApi
+
+__all__ = ["TrendApi"]
diff --git a/src/otf_api/api/trends/trend_api.py b/src/otf_api/api/trends/trend_api.py
new file mode 100644
index 00000000..05f83f0b
--- /dev/null
+++ b/src/otf_api/api/trends/trend_api.py
@@ -0,0 +1,71 @@
+import typing
+from datetime import date
+
+import pendulum
+
+from otf_api.api import utils
+from otf_api.models.trends import (
+    TrendType,
+    WorkoutStatsPreviewResponse,
+    WorkoutStatsResponse,
+)
+
+from .trend_client import TrendClient
+
+if typing.TYPE_CHECKING:
+    from otf_api import Otf
+    from otf_api.api.client import OtfClient
+
+DEFAULT_PREVIEW_WORKOUT_COUNT = 10
+
+
+class TrendApi:
+    """API for retrieving workout trend data from OrangeTheory.
+
+    Provides methods to get per-metric trend data (splat points, heart rate,
+    treadmill speed, rower stats) over time, as well as a preview across all metrics.
+    """
+
+    def __init__(self, otf: "Otf", otf_client: "OtfClient"):
+        self.otf = otf
+        self.client = TrendClient(otf_client)
+
+    def get_workout_stats(
+        self,
+        trend_type: TrendType | str,
+        start_date: date | str | None = None,
+        end_date: date | str | None = None,
+    ) -> WorkoutStatsResponse:
+        """Get detailed workout stats for a specific metric over a date range.
+
+        Args:
+            trend_type: The trend metric to retrieve (e.g. TrendType.SplatPoints).
+            start_date: Start of the date range. Defaults to 90 days ago.
+            end_date: End of the date range. Defaults to today.
+
+        Returns:
+            WorkoutStatsResponse: The stat data with individual data points per workout.
+        """
+        start = utils.ensure_date(start_date) or pendulum.today().subtract(days=90).date()
+        end = utils.ensure_date(end_date) or pendulum.today().date()
+
+        start_str = pendulum.instance(pendulum.datetime(start.year, start.month, start.day)).to_iso8601_string()
+        end_str = pendulum.instance(pendulum.datetime(end.year, end.month, end.day, 23, 59, 59)).to_iso8601_string()
+
+        stats_key = str(trend_type)
+        data = self.client.get_workout_stats(stats_key, start_str, end_str)
+        return WorkoutStatsResponse(**data)
+
+    def get_workout_stats_preview(
+        self, workout_count: int = DEFAULT_PREVIEW_WORKOUT_COUNT
+    ) -> WorkoutStatsPreviewResponse:
+        """Get a preview of workout stats across all trend metrics.
+
+        Args:
+            workout_count: Number of recent workouts to include. Default is 10.
+
+        Returns:
+            WorkoutStatsPreviewResponse: Preview data with stats across all metrics.
+        """
+        data = self.client.get_workout_stats_preview(workout_count)
+        return WorkoutStatsPreviewResponse(**data)
diff --git a/src/otf_api/api/trends/trend_client.py b/src/otf_api/api/trends/trend_client.py
new file mode 100644
index 00000000..fb1bc091
--- /dev/null
+++ b/src/otf_api/api/trends/trend_client.py
@@ -0,0 +1,42 @@
+from typing import Any
+
+from otf_api.api.client import API_GATEWAY_BASE_URL, OtfClient
+
+
+class TrendClient:
+    """Client for retrieving workout trends/stats data from the OTF Gateway API."""
+
+    def __init__(self, client: OtfClient):
+        self.client = client
+
+    def gateway_request(
+        self, method: str, path: str, params: dict[str, Any] | None = None, headers: dict[str, Any] | None = None
+    ) -> Any:  # noqa: ANN401
+        """Perform an API request to the Gateway API."""
+        return self.client.do(method, API_GATEWAY_BASE_URL, path, params, headers=headers)
+
+    def get_workout_stats(self, stats_key: str, start_date: str, end_date: str) -> dict:
+        """Retrieve workout stats for a specific metric over a date range.
+
+        Args:
+            stats_key: The stat key (e.g. 'splat_points', 'average_hr').
+            start_date: ISO-format start date.
+            end_date: ISO-format end date.
+        """
+        return self.gateway_request(
+            "GET",
+            f"/consumer-mobile/v1/users/me/workout-stats/{stats_key}",
+            params={"start": start_date, "end": end_date},
+        )
+
+    def get_workout_stats_preview(self, workout_count: int = 10) -> dict:
+        """Retrieve a preview of workout stats across all metrics.
+
+        Args:
+            workout_count: Number of recent workouts to include. Default is 10.
+        """
+        return self.gateway_request(
+            "GET",
+            "/consumer-mobile/v1/users/me/workout-stats/preview",
+            params={"workoutCount": workout_count},
+        )
diff --git a/src/otf_api/models/__init__.py b/src/otf_api/models/__init__.py
index c22cf168..af95b7f6 100644
--- a/src/otf_api/models/__init__.py
+++ b/src/otf_api/models/__init__.py
@@ -13,6 +13,14 @@
 from .members import MemberDetail, MemberMembership, MemberPurchase
 from .members.notifications import EmailNotificationSettings, SmsNotificationSettings
 from .studios import StudioDetail, StudioService, StudioStatus
+from .trends import (
+    PreviewStat,
+    StatPoint,
+    TrendCategory,
+    TrendType,
+    WorkoutStatsPreviewResponse,
+    WorkoutStatsResponse,
+)
 from .workouts import (
     BodyCompositionData,
     ChallengeCategory,
@@ -53,7 +61,9 @@
     "OutOfStudioWorkoutHistory",
     "OutStudioStatsData",
     "PerformanceSummary",
+    "PreviewStat",
     "SmsNotificationSettings",
+    "StatPoint",
     "StatsResponse",
     "StatsTime",
     "StudioDetail",
@@ -62,7 +72,11 @@
     "Telemetry",
     "TelemetryHistoryItem",
     "TimeStats",
+    "TrendCategory",
+    "TrendType",
     "Workout",
+    "WorkoutStatsPreviewResponse",
+    "WorkoutStatsResponse",
     "get_class_rating_value",
     "get_coach_rating_value",
 ]
diff --git a/src/otf_api/models/trends/__init__.py b/src/otf_api/models/trends/__init__.py
new file mode 100644
index 00000000..906fdfba
--- /dev/null
+++ b/src/otf_api/models/trends/__init__.py
@@ -0,0 +1,16 @@
+from .enums import TrendCategory, TrendType
+from .trends import (
+    PreviewStat,
+    StatPoint,
+    WorkoutStatsPreviewResponse,
+    WorkoutStatsResponse,
+)
+
+__all__ = [
+    "PreviewStat",
+    "StatPoint",
+    "TrendCategory",
+    "TrendType",
+    "WorkoutStatsPreviewResponse",
+    "WorkoutStatsResponse",
+]
diff --git a/src/otf_api/models/trends/enums.py b/src/otf_api/models/trends/enums.py
new file mode 100644
index 00000000..a26bacf6
--- /dev/null
+++ b/src/otf_api/models/trends/enums.py
@@ -0,0 +1,35 @@
+from enum import StrEnum
+
+
+class TrendCategory(StrEnum):
+    """Categories that group related workout trend metrics."""
+
+    Effort = "effort"
+    Treadmill = "treadmill"
+    Rower = "rower"
+
+
+class TrendType(StrEnum):
+    """Available workout stat keys for the trends API."""
+
+    SplatPoints = "splat_points"
+    AverageHeartRate = "average_hr"
+    PeakHeartRate = "peak_hr"
+    TreadmillTopSpeed = "tread_top_speed"
+    RowerSplitTime = "rower_500m_split_time"
+    RowerTopPower = "rower_top_power"
+
+    @property
+    def category(self) -> TrendCategory:
+        """Get the category this trend type belongs to."""
+        return _TREND_CATEGORY_MAP[self]
+
+
+_TREND_CATEGORY_MAP: dict[TrendType, TrendCategory] = {
+    TrendType.SplatPoints: TrendCategory.Effort,
+    TrendType.AverageHeartRate: TrendCategory.Effort,
+    TrendType.PeakHeartRate: TrendCategory.Effort,
+    TrendType.TreadmillTopSpeed: TrendCategory.Treadmill,
+    TrendType.RowerSplitTime: TrendCategory.Rower,
+    TrendType.RowerTopPower: TrendCategory.Rower,
+}
diff --git a/src/otf_api/models/trends/trends.py b/src/otf_api/models/trends/trends.py
new file mode 100644
index 00000000..55ee6ec3
--- /dev/null
+++ b/src/otf_api/models/trends/trends.py
@@ -0,0 +1,44 @@
+from datetime import datetime
+
+from pydantic import Field
+
+from otf_api.models.base import OtfItemBase
+
+
+class StatPoint(OtfItemBase):
+    """A single data point in a workout stats time series."""
+
+    date: datetime | None = None
+    value: float | None = None
+    workout_id: str | None = None
+    class_type: str | None = None
+    class_name: str | None = None
+
+
+class WorkoutStatsResponse(OtfItemBase):
+    """Response from the workout stats endpoint for a single metric over a date range."""
+
+    start_date_time: datetime | None = Field(None, validation_alias="start")
+    end_date_time: datetime | None = Field(None, validation_alias="end")
+    stat_key: str | None = None
+    unit: str | None = None
+    value_type: str | None = None
+    points: list[StatPoint] = Field(default_factory=list)
+
+
+class PreviewStat(OtfItemBase):
+    """A single metric's data within a workout stats preview response."""
+
+    points: list[StatPoint] = Field(default_factory=list)
+    stat_key: str | None = None
+    unit: str | None = None
+    value_type: str | None = None
+
+
+class WorkoutStatsPreviewResponse(OtfItemBase):
+    """Response from the workout stats preview endpoint, containing all metrics."""
+
+    start_date_time: datetime | None = Field(None, validation_alias="start")
+    end_date_time: datetime | None = Field(None, validation_alias="end")
+    stats: list[PreviewStat] = Field(default_factory=list)
+    requested_workout_count: int | None = None